humphrey visual field test for blepharoplasty

Burnstein Y, Ellish NJ, Magbalon M, Higginbotham EJ. Ophthalmology 1993; 100: 658659. Tobradex (tobramycin and dexamethasone, Alcon) ointment was placed over the wounds. Commissioning policy and Referral guidelines for provision of Aesthetic Surgery for NHS Patients. Medicaid: Eligibility and Vision Benefits. When diagnosing ptosis, your eye doctor will closely examine the position of your upper eyelids in relation to each other and to the pupil of each eye. The patient was undergoing treatment for several months by her otolaryngologist for a blocked salivatory gland on the right side. The VF code should be linked to the appropriate glaucoma ICD-10 code in this case, one of the following: Although visual field tests have been used to demonstrate objectively deficits associated with ptosis or dermatochalasis,9, 10, 11, 12, 13, 14, 15 the previously used techniques proved to be time consuming,10, 11 operator dependent8 or inadequate. Twenty healthy individuals (40 eyes) with an average age of 51 were also tested; only three eyes in three separate patients showed just three contiguous absolute missed points. trailer Answer 1: A common mistake ophthalmologists make is billing 92082 when they could legitimately report 92083. For the 10 eyes who saw fewer points after ptosis surgery, 7 had deterioration by only 5 points or less compared with before the operation (Figure 3). In cases of decreased visual acuity, a size V (64 mm2) target is used to garner useful information. A HVF-teszt szmos lehetsges szembetegsg, pldul a glaukma diagnosztizlsban hatkony. At less than 5mm of wetting, the patient has clinically significant dry eye. Visual field loss in primary gaze and reading gaze due to acquired blepharoptosis and visual field improvement following ptosis surgery. Finally, maximal levator function shows how high the patient can lift his or her lid voluntarily. Name, demographics, etc: Make sure you are looking at the right patient! If results show a significant amount of eyesight is affected by ptosis, corrective surgery (blepharoplasty) becomes medically necessary rather than cosmetic. Visual field test looks for visual field defects and their location. When the skin of the upper lids rests across the eyelashes, it is an indication that the vision may be compromised by the eyelid configuration. Regarding visual field height, 75 eyes (81%) had improvement in visual field height post-ptosis surgery with or without blepharoplasty. Case Report: Solving Functional and Cosmetic Complaints. Dermatochalasis is loose skin of the upper or lower eyelids and is considered part of the normal aging process. Blepharoplasty corrects these problems and also removes puffiness and bags from under the eyes that can create a worn, tired look. I informed the patient that her droopy lids were a factor in her ocular discomfort and perceived diminished distance vision and recommended that she have an oculoplastic consult with a local ophthalmologist. 0000016434 00000 n There is lack of consensus among Primary Health Care Trusts (PCTs) and health insurers on how to reimburse ptosis surgery and upper lid blepharoplasty, as these procedures can be regarded as cosmetic. Brow Ptosis vs. Dermatochalasis xref A mild to moderate amount of excess eyelid skin results in a tired, sad appearance. If you plotted three isopters, however, that would be an extended examination, which would qualify for 92083. Arch Ophthalmol 1992; 110: 6367. A relative defect identifies a stimulus not seen at 6dB above the reference threshold, but seen at an intensity of 0dB. Leitlinien der Kommission fr Okuloplastik (Orbita + Dakryologie) der OG, Brow ptosis: are we measuring the right thing? Best-corrected visual acuity measured 20/20 O.D. Meyer DR, Linberg JV, Powell SR, Odom JV . However, the vast majority of patients have normal eyelids when they are born and develop droopy eyelids in adulthood, a condition known as acquired ptosis. Thank you for visiting nature.com. SCODI: 92132-92134 Attention was first directed to the right upper lid. Central testing to view into the macula with SITA Faster 24-2C. 0000018300 00000 n Quantitating the superior visual field loss associated with ptosis. Answer 4: Because the results of the VFs were negative they did not confirm glaucoma or any condition you should report the signs and symptoms that prompted the exam, link the diagnosis code(s) to the applicable VF code, and include any additional observations from the VFs in the office notes. endstream endobj 296 0 obj <>/Metadata 52 0 R/Outlines 47 0 R/Pages 51 0 R/StructTreeRoot 54 0 R/Type/Catalog/ViewerPreferences<>>> endobj 297 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text]/Properties<>/XObject<>>>/Rotate 0/StructParents 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 298 0 obj [299 0 R 300 0 R 301 0 R] endobj 299 0 obj <>/Border[0 0 0]/H/N/Rect[325.42 543.235 395.044 529.826]/StructParent 1/Subtype/Link/Type/Annot>> endobj 300 0 obj <>/Border[0 0 0]/H/N/Rect[412.001 543.235 481.625 529.826]/StructParent 2/Subtype/Link/Type/Annot>> endobj 301 0 obj <>/Border[0 0 0]/H/N/Rect[190.203 530.635 265.57 517.226]/StructParent 3/Subtype/Link/Type/Annot>> endobj 302 0 obj <> endobj 303 0 obj <> endobj 304 0 obj <> endobj 305 0 obj <> endobj 306 0 obj <> endobj 307 0 obj <> endobj 308 0 obj <> endobj 309 0 obj <>stream If the patient only wets 5mm to 10mm in five minutes, he or she is at risk for dry eye. You are using a browser version with limited support for CSS. Hey Peter not just me working on this, we have a big team behind the scenes that creates our content! Many methods are available to test the visual field. Diagnosing ptosis seems pretty straightforward. The height of visual field before surgery ranged between 0 to 48 with a median of 12 (mean 18, SD 12.8). Furthermore, she had been using artificial tears copiously with no improvement. Copyright 2023 Jobson Medical Information LLC unless otherwise noted. Cahill KV, Burns JA, Weber PA . 0000002698 00000 n Effects of upper lid blepharoplasty on visual quality in patients . It's an automated, static perimeter (unlike Goldmann kinetic perimetry which requires a human operator, and uses a moving target). This large study clearly demonstrates that ptosis and dermatochalasis may be associated with superior visual field defects and is comparable with other studies.9, 10, 11, 12, 13 We have also shown that ptosis surgery and blepharoplasty will improve the visual field as evidenced by the increase in the height as well as number of points seen in the visual field. The patient tolerated the procedure well and was moved to recovery room in stable condition. To obtain volume25,pages 365369 (2011)Cite this article. 0000006002 00000 n You should always document medical necessity for the level of visual field testing that is ordered. Page published on Tuesday, September 22, 2020. The Humphrey uses fixed points of light which are shown at different intensity levels. Other sizes and colors are used for patients with late disease or retinal disease. Although it is hard to be dictatic about the extent of the defect before patients are considered eligible for surgery, we propose that any three contiguous points missed up to 48 should be considered a significant defect and that those patients will benefit from intervention. Abnormal pupillary response, particularly a smaller-than-normal pupil that has difficulty dilating, could indicate Horners syndrome when paired with a droopy eyelid. Overall, she is doing great and continues to be pleased with her surgical result. Involvement of the lower eyelids can be quite dramatic; this protruding tissue is known as malar bags or festoons. In addition, after being divorced for many years, and choosing not to date, the patient has met a widowed gentleman, and they are a couple. Risk of dry eye should be objectively measured by evaluating the patients tear film break-up time (TFBUT) and by performing a Schirmers tear test. Federici T, Meyer DR, Lininger LL . Very Helpful, but did not explain MD, and pattern deviation. Time taken to perform the test post-operatively ranged from 2.20 to 6.17min with the median reduced to 3.27min (mean 3.29min, SD 0.53min). This patient presented for a red-eye exam, but further investigation revealed 5/25/2018 8 Patterns of threshold testing, cont. Functional vs cosmetic ophthalmologic defects. 0000040668 00000 n If there is traumatic or neurologic dysfunction, then simply shortening the levator aponeurosis will not fix the problem. This was then carried through the exposed levator aponeurosis several millimeters superiorly. In: Engelberg AL (ed). Coding involving lab orders, E/M [], Question: Notes indicate that the provider treated a patient with a retinal migraine. Ive never [], Question: Have the modifier 25 rules changed now that the E/M guidelines are different? Dry eye syndrome can be a postoperative complication of blepharoplasty. The age range was 2087 with median of 67. The objective of this article is to discuss the diagnosis and surgical management of patients in need of functional blepharoplasty in which the primary goal is restoring vision. What do the numbers on your eyeglass frames mean? If a patient presents with signs and symptoms of glaucoma, and a VF confirms the condition, you should report the code for the confirmed diagnosis. What are your thoughts on the VR based perimeters vs HFA (or as a complement)? The patient was undergoing treatment for several months by her otolaryngologist for a blocked salivatory gland on the right side. For example, if the eye care specialist plots only two isopters on the Goldmann perimeter, CPT would call that intermediate, based on its description of 92082. No jargon, very nicely put and clearly explained. Normal wetting is 10mm to 30mm in five minutes in patients less than 50 years of age. She reported frustration that she had been unable to do so for at least five years. In this case, the appropriate ICD-10 diagnosis code is one of the following, depending on which eye is affected: Some payers require a code from the H40.001-H40.009 (Preglaucoma, unspecified) series when the diagnostic testing does not confirm glaucoma. The pedicle was cauterized before the clamp was released. We therefore designed a modified visual field test specifically to assess ptosis and dermatochalasis. 0000015208 00000 n Surgery often lasts less than an hour and produces minimal pain. One eye remains covered while the other eye is to stay focused on a central fixation point. The inferior field test serves as a reference, but is not used in the analysis. Identification of glaucoma-related visual field abnormality with the screening protocol of frequency doubling technology. 1) Nonspecific / low Reliability / inattention / patient hungry, 4) Severe constriction with a central island, Unfortunately, this is end stage glaucoma. All rights reserved. All About Vision and AllAboutVision.com are registered trademarks of AAV Media, LLC. This is supported by Small et al's study showing that 97% of patients with a marginal reflex distance of 2mm or less had upper visual field restriction of 30 or less.7 In the United States, our American colleagues use Goldmann or automated static perimetry, which is either a 10dB threshold (Humphrey analyzer) or a 7dB threshold (Octopus analyzer).8 Although the latter is accurate, it is time consuming and subject to a huge learning curve with high false positives and negatives. Prolapsing fat pads were clamped over with a hemostat and excised. Acquired senile eyelid ptosis, also known as involutional ptosis, is a common condition in the elderly population. Its normal for your eye doctor to test your pupillary reaction when diagnosing ptosis. Patients also must be advised to avoid vigorous exercise for one week following surgery. Append modifier TC (Technical component) to the code to report your work. This Part B Payer Is Watching, E/M coding also ranks high on the MACs watch list. People in this category are good candidates for cosmetic blepharoplasty. A deficient time is considered any TFBUT of less than 10 seconds. Do eye exercises work for droopy eyelids. HFA3 delivers the interactive analysis you need, when and where you need it. For blepharoplasty, it is for photographs demonstrating dermatochalasis and a visual field showing a defect to at least 30 above the visual axis and which is significantly improved or. And, warn patients not to wear contact lenses or eyelid makeup for one week following blepharoplasty surgery. A functional levator resection and blepharoplasty were scheduled. If a patient presents with signs and symptoms of glaucoma, and a VF confirms the condition, you should report the code for the confirmed diagnosis. In screening fields, you are testing whether the retina is on or off, while in threshold testing you are testing how dim a light you can perceive?. First, your eye doctor will observe your eyes in different levels of lighting to check for anisocoria (different sized pupils). These are probably 25%-35% of the fields we see. Dermatochalasis is a condition in which there is excess upper eyelid skin. 0000043130 00000 n Ophthal Plast Reconstr Surg 1992; 8: 250255. Documented photo of eyelid droop or dermatochlasia (excess skin above the eyelid) 2. Central 30-2 threshold visual field testing showed markedly improved visual fields with eyelids taped, which underscored the medical necessity of blepharoplasty in this patient. The area of excision of skin and muscle was outlined and compared for symmetry. Your best bet is to check with your local carrier to determine if billing guidelines exist. Humphrey automated static visual field testing were both effective in documenting ptosis-associated visual field loss. Wojno TH . Although there is a great deal of overlap, patients who desire blepharoplasty generally fall into two broad categories. Its an. The number of points missed before blepharoplasty ranged from 2 to 35 (median 17, mean 17.44, SD 8.72), and the height of superior visual field in this group ranged from 0 to 48 (median 24, mean 20.26, SD 12.2). The requirement from some PCT for an individual case review for each procedure has also created a significant workload for those involved in the decision making process. It has a wider angle and can capture peripheral field defects. Visual field impairment may result in the need for functional blepharoplasty. The patient complained of constant headaches, bloodshot eyes and tearing. Can you tell us [], Copyright 2023. Article Post-operatively the height of the field ranged from 12 to 48 with an improved median of 36 (mean 37.87, SD 9.14). This is awesome thanks a lot for putting this together Ben! Blepharoplasty Question 1: How many isopters do I need to plot on the Goldman perimeter to be able to report CPT code 92083 (Visual field examination, unilateral or bilateral, with interpretation and report; extended examination (eg, Goldmann visual fields with at least 3 isopters plotted and static determination within the central 30, or quantitative, automated threshold perimetry, Octopus program G-1, 32 or 42, Humphrey visual field analyzer full threshold programs 30-2, 24-2, or 30/60-2))? Answer 2: When deciding whether to bill for services unilaterally, per eye, or bilaterally, for both eyes, the first thing to do is read the code description in CPT. As the gold standard of perimetry, Humphrey Field Analyzer 3 (HFA3) is your trusted diagnostic partner. In a further 37 eyes (39%) the improvement in points seen was between 11 and 20, and in the remaining 23 eyes (24.2%) there was an improvement in 10 or less points. After all, the condition is characterized by drooping eyelids, which are fairly simple to detect. It was presented as an oral presentation in the European Society of Ophthalmic Plastic and Reconstructive Surgery (ESOPRS) meeting, Munich in September 2010. Ophthal Plast Reconstr Surg 1992; 8: 126129. This is sometimes called a Humphrey visual field test because the Humphrey Visual Field Analyzer is the most popular device used to perform this type of test. Example 2: The eye care physician performs visual fields for a patient who presents with high intraocular pressure, open angle, and the VFs confirm the presence of small scotomas in the areas of the VF related to glaucoma. Arch Ophthalmol 1994; 109: 11941195. We are grateful for the help of Mr Bernie Higgins from Portsmouth University for his statistical advice. Y@Qt@d``@= dI10@Q^ PxB Question 1: How many isopters do I need to plot on the Goldman perimeter to be able to report CPT code 92083 (Visual field examination, unilateral or bilateral, with interpretation and report; extended examination (eg, Goldmann visual fields with at least 3 isopters plotted and static determination within the central 30, or quantitative, automated threshold perimetry, Octopus program G-1, 32 or 42, Humphrey visual field analyzer full threshold programs 30-2, 24-2, or 30/60-2))? 0000006786 00000 n A standard Schirmer test uses a strip of Whatman #41 filter paper, 5mm in width x 30mm in length, with a fold 5mm from the end. The TFBUT measures the quality and stability of the tear film. However, since Medicare will only pay for functional dermatochalasis or ptosis, a visual field is necessary before a referral can be made for a functional eyelid lift. H40.10X4 ( indeterminate stage). As a very, very general guideline, you can look at the density / size of the field defect, the pattern standard deviation, and the mean deviation (MD) to see if it is worsening. Eyeglass temples: How do you know if they're the right length? hb```b``b`c` @1v5"n Pate, OD, FAAO Associate Professor, UAB School of Optometry, Birmingham, AL Definitions 2 . 1. CPT code 92082: Visual field ex-amination, unilateral or bilateral, with interpretation and report; intermediate examination (e.g., at least 2 isopters on Goldmann perimeter, or semiquantita - tive, automated suprathreshold screen-ing program, Humphrey suprathreshold automatic diagnostic test, Octopus pro - gram 33). Your doctor will then typically use a flashlight from the side of your face to direct light into each of your eyes to test how your pupils respond to light. _= !uH\tzUw)d;'vW51]qx9O]T8QVNq6Ow5\{~6>q:ojwqOqF-mj=l4~:6Fer[;288[4TM-gqMu~JM4.m-[lG~_}oviO/VwsO|F7uo5lS`SWEES@.{= l_ uxk~pSPGz%Lk}0c@VC[ou5,y`#=#xYrZpZrZpZ(Wf&y. Patients who were referred for surgery were requested to perform a modified Humphrey visual field test. Question 2: Are the visual fields codes unilateral or bilateral? 0000041939 00000 n Other patients with obvious ptosis who struggle to sit at the analyzer or maintain adequate concentration should not be denied surgery on the basis of this test alone. The two most important to look at are the Grayscale Map and the Pattern Deviation. and 20/40 O.S., with no improvement upon pinhole testing. Post-operatively the number of points missed ranged from 0 to 33, but the median improved to 4 (mean 7, SD 7.62). Seventy eyes (90.9%) had an improvement in points seen post blepharoplasty while 3 (3.5%) were unchanged and 4 (5.2%) saw up to five points fewer than pre-op (Figure 3). Two grids were created on either side of the x axis. However, those with brow ptosis, asymmetry with unilateral anophthalmic socket or other known ocular pathology associated with a visual field defect, such as glaucoma, optic neuropathy, diabetic retinopathy (eg, previous panretinal photocoagulation) or other neurological problems were excluded. HVF targets come in sizes ranging from 0.25 mm2 to 64.00 mm2 represented by Roman numerals I through V. Typically, a size III stimulus (4 mm2) is used in patients with good visual acuity (usually at least 20/200 or better). H40.011 (Open angle with borderline findings, low risk, right eye) We aim to use this new assessment tool to demonstrate the functional disability associated with these conditions and the effectiveness of surgery in improving the superior visual field. H40.019 ( unspecified eye) Best to check your payer coverage policy. You should avoid reporting multiple units of the code if you address both eyes, and you also should avoid appending modifier 50 (Bilateral procedure) or the LT (Left side) and RT (Right side) modifiers. The first category includes people who wish to accentuate their eyes, improve their overall appearance, and reduce the tired look of excess and redundant eyelid tissue. Stimulus characteristics: 99% of visual fields (VFs) will use the size 3 white stimulus. The distance of how far your upper eyelid moves when your gaze changes, will be measured and analyzed. Documented clinical exam by a physician 3. Dermatochalasis constitutes a special group as blepharoplasty has long been considered as cosmetic surgery. If you simply cannot get a visual field due to patient cooperation or attention, you can order an optic nerve OCT to follow the optic nerve head objectively (though thinning does not always necessarily correlate to field loss). It indicates how close the upper lid is to the visual axis. Patients with ptosis and dermatochalasis often complain of a superior visual field defect that is not detectable with 24-2 testing, but which is influencing their visual function and confidence for activities such as driving and crossing the road, or their occupational requirements such as in engineering. C=KHoI_!eXbxR;(/c& qOF|yOm0 .Pxc|8?d:1`g80C9@ @^b`o]_"moE&7)}# u A complete recovery is said to take approximately six weeks, but patients will look even better at three months and better still at six months. Funding or reimbursement of ptosis surgery and blepharoplasty within the healthcare setting has long been a contentious issue.1 Various arbitrary guidelines have been issued by medical insurers and Primary Health Care Trusts (PCTs).2, 3, 4, 5, 6 The lack of consistency and clarity of these guidelines has created a significant amount of confusion, causing anxiety for patients and raising questions of a postcode lottery. A visual field test assesses the integrity and health of vision, which helps detect physiological dysfunctions. If the patient can actually see the spot, then its recorded as a fixation loss. Or, the visual field could just be patchy all over. Meyer DR . Some payers require a code from the H40.001-H40.009 (. ) If visual field tests are performed, the tests should show loss of 2/3 or greater of a visual field in the upper or temporal areas documented by computerized visual field studies, with visual field restored by taping or holding up the upper lid. The HFA 24-2 tests 54 points in the central 24 to 30 degrees of the visual field. This is the million dollar question. AskMayoExpert. For the dry eye syndrome, I prescribed Systane Ultra Preservative-Free (Alcon) b.i.d. The authors declare no conflict of interest. Ophthalmic Plast Reconstr Surg 1987; 3: 121127. Answer 1: A common mistake ophthalmologists make is billing 92082 when they could legitimately report 92083. Answer 4: Because the results of the VFs were negative they did not confirm glaucoma or any condition you should report the signs and symptoms that prompted the exam, link the diagnosis code(s) to the applicable VF code, and include any additional observations from the VFs in the office notes. Change in visual field height post-ptosis surgeries with and without blepharoplasty vs blepharoplasty only. Humphrey Field Analyzer - HFA II- i Series Advanced analysis with comprehensive connectivity options Validated by more than 30 years of research, design and clinical experience, the Humphrey Field Analyzer (HFA) is the accepted standard of care in glaucoma diagnosis and management. Does anyone know how to differentiate a functional defect from a cosmetic one? 0000013473 00000 n Append modifier TC (Technical component) to the code to report your work. Comparison of frequency doubling perimetry with humphrey visual field analysis in a glaucoma practice. For both of these tests, the We therefore believe it to be a useful assessment tool providing evidence for reimbursement by medical insurers or PCT. A skin muscle flap was then elevated and excised entirely over the extra skin of the upper lid. Maximal Levator Function: 12mm O.D., 12mm O.S. Small RG . %%EOF The Humphrey perimeter tests light intensities over 5 orders of magnitudes, from 10,000 apostilbs (asb) to 0.1 asb. Use this order to interpret your Humphrey visual field every time: Great help in understanding the VF pattern. 1. Hacker HD, Hollsten DA . S F Ho. Small R, Sebates NR, Burrows D . The Humphrey uses fixed points of light which are shown at different intensity levels. The machine keeps track of when the button is pushed during the test and analyzes the results to create a map of the size and shape of the patients visual field. A mild to moderate amount of excess eyelid skin results in a tired, sad appearance. But ptosis testing doesnt end at eyelid observation. However, a recent review of 141 medical records of patients with dermatochalasis found that nearly 87% of patients with keratoconjunctivitis sicca (KCS) had subjective improvement of symptoms after upper lid (UL) blepharoplasty.3 This suggests that UL blepharoplasty may be a useful element in the treatment of patients with both dermatochalasis and dry eye. Appropriate pain management includes Tylenol, ice and ophthalmic antibiotic/steroid ointments. In the United Kingdom, most centres use either Goldmann visual field or Humphrey 24-2 as is used for glaucomatous patients. But ophthalmologists use the threshold exam (92083) when they suspect something that causes a slow, progressive dimming of peripheral vision, like glaucoma. Individuals with severe ptosis will have difficulty detecting lights in upper regions of their peripheral vision due to an obstructing eyelid. False negative: The user did not see a stimulus which was brighter than one they saw earlier in the same test. Your eye doctor may also ask if one side of your face is unable to sweat, as this is another common sign of Horners syndrome. Signs and Symptoms May Apply Discussion. For example, for one particular medical insurer, the criteria to prove that ptosis is a functional disability includes provision of a full-face photograph demonstrating that the upper lid droops over the pupillary aperture to a degree consistent with the abnormal visual field. Hemostasis was established here and throughout the procedure with a Bovie Cautery and cotton-tipped applicators. Fixation loss: The HVF will routinely flash dots in the patients physiological blind spot to check if the patient has his / her gaze fixated on the center. The Humphrey visual field test measures the entire area of peripheral vision that can be seen while the eye is focused on a central point. Insurance requirement testing for cataract surgery, blepharoplasty, and LASIK.Administrative duties which included answering . Follow-up revealed that the patients visual acuity remained stable at its pre-operative level. Next, measure the margin reflex distance. We are also grateful for the help of Mr Jonathan Bhargava and Mrs Katya Tambe for their initial work on this project. Visual field testing with eyebrows relaxed, patient looking straight ahead, and the eyelids in normal relaxed position; Visual field is repeated with the eyelids taped up. Exceptions to automated testing will be made for children under 12 years old and in rare instances when automated testing is not able to be performed (e.g., developmental disability). 0000001964 00000 n the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Marginal reflex distance can also be measured between the pupils center and the lower lid. Whether youre a VF coding newbie or a seasoned expert, the answers to these questions that readers have submitted to Ophthalmology and Optometry Coding Alert can help you get all of your deserved reimbursement for these tests. Grid A (above the x axis) has the following co-ordinates: Grid B (below the x axis) has the following co-ordinates: Further information about the setting-up of the test can be obtained via e-mail at joyce.burns@uhl-tr.nhs.uk. 0000020476 00000 n In women, the optimal position of the brow is above this rim, especially on the lateral side. A binary statistical calculation was performed to identify the relationship between the presence of a visual field defect and ptosis. Unfortunately, this is end stage glaucoma. Visual field testing (92081-92083, Visual field [], Bust These Myths to Collect for IOL Power Calculations, Keep bilateral rules in mind as you navigate these coding situations.

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