Refractive error with the Barrett True-K No History versus Panacea formula in cataract operated patients with a history of radial keratotomy

Background: Posterior polymorphous corneal dystrophy (PPCD) is typically considered bilateral and asymptomatic. However, few case reports on patients with unilateral PPCD with asymmetric refractive error have mentioned anisometropic amblyopia development. In support of this, we report 3 cases of unilateral PPCD that presented as anisometropic astigmatism. Visual prognosis related to amblyopia development is discussed. Case Presentation: All 3 patients had a band lesion in the affected eye and a difference of at least 1.5 diopters in cylindrical refractive error between their eyes. The affected eye had a greater amount of astigmatism in all cases. Two patients (Cases 1 and 2) also had amblyopia in the affected eye. Case 1 was a 25-year-old male with a unilateral PPCD diagnosis and a band lesion involving the visual axis. Case 2 was an 11-year-old boy diagnosed with unilateral PPCD. The boy was treated with occlusion and atropine therapy over a 2-year period. Case 3 was a 4-year-old girl diagnosed with unilateral PPCD. The girl had a 30-month history of corrective spectacle use and had no amblyopia. In all cases, the corneal endothelial cell count was lower in the affected eye than in the unaffected contralateral eye. Conclusions: Practitioners should closely monitor patients with unilateral PPCD for astigmatic anisometropia and amblyopia development. Visual prognosis for patients with unilateral PPCD may be related to lesion position, age at diagnosis, astigmatism severity, and early-childhood corrective spectacle use.

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Early Childhood Refractive Error and Parental History of Myopia as Predictors of Myopia

Investigative Opthalmology & Visual Science ◽

10.1167/iovs.08-3210 ◽

2010 ◽

Vol 51 (1) ◽

pp. 115 ◽

Cited By ~ 43

Author(s):

Lisa A. Jones-Jordan ◽

Loraine T. Sinnott ◽

Ruth E. Manny ◽

Susan A. Cotter ◽

Robert N. Kleinstein ◽

...

Keyword(s):

Early Childhood ◽

Refractive Error ◽

Parental History ◽

History Of

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Artisan iris-fixated toric phakic and aphakic intraocular lens implantation for the correction of astigmatic refractive error after radial keratotomy

Journal of Cataract & Refractive Surgery ◽

10.1016/j.jcrs.2006.10.046 ◽

2007 ◽

Vol 33 (3) ◽

pp. 531-535 ◽

Cited By ~ 15

Author(s):

Nayyirih G. Tahzib ◽

Fred A.G.J. Eggink ◽

Monica T.P. Odenthal ◽

Rudy M.M.A. Nuijts

Keyword(s):

Intraocular Lens ◽

Refractive Error ◽

Intraocular Lens Implantation ◽

Radial Keratotomy ◽

Lens Implantation

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Relief-topography of anterior and posterior corneal surfaces in myopic patients in the long-term follow-up period after anterior radial keratotomy

Fyodorov journal of ophthalmic surgery ◽

10.25276/0235-4160-2021-1-22-28 ◽

2021 ◽

pp. 22-28

Author(s):

E.K. Tsyrenzhapova ◽

◽

O.I. Rozanova ◽

O.I. Mikova ◽

A.A. Ivanov ◽

...

Keyword(s):

Anterior Part ◽

Posterior Part ◽

Control Group ◽

Average Deviation ◽

Radial Keratotomy ◽

Age Related ◽

Peripheral Area ◽

Long Term Follow Up ◽

History Of

Purpose. To analyze the topographical features of the relief of anterior and posterior corneal surfaces in patients with myopia in the long-term period after anterior radial keratotomy (ARK). Material and methods. We examined 132 patients with age-related cataracts of varying degrees of density and a history of myopia with previously performed ARK. Mean age of patients was 59.67±6.09 (from 47 to 76). In the control group, 30 patients of the same age group with myopia were examined. A comprehensive examination was performed, including optical biometry, keratotopography on the Pentacam HR device with the determination of the elevation points of the anterior and posterior corneal surfaces. Results. The corneal profile differed from the correct spherical configuration in the control group. The average deviation of the profile of the anterior part of the cornea from the BFS was (–)1.41±5.10 µm, the posterior part was (–)5.12±12.25 µm (p=0.0001). The profile of the posterior corneal surface had a pronounced prolapse in the paracentral area with positive elevation values in the lower-outer segment. Negative values were found in the upper and lower sectors in the peripheral area and positive values were found in the inner and outer sectors. The corneal profile was deformed in patients after ARK. Negative elevation values in the central and paracentral area and positive elevation values in the peripheral segments corresponding to its protrusion were noted. At the same time, the relief of anterior and posterior surfaces of the cornea was not regular. Prolapse from the posterior surface of the cornea in the peripheral area was more pronounced than its anterior surface (p=0.0001). Conclusion. The relief of anterior and posterior corneal surfaces in patients of the control group differs in the degree and topography of elevation. In patients after ARK, obvious topographic deformities of the anterior and posterior corneal profiles were detected. Key words: anterior radial keratotomy, corneal elevation, myopia.

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Topographical Irregularity and Keratoconic Findings in Five Siblings and their Parents

International Journal of Keratoconus and Ectatic Corneal Diseases ◽

10.5005/jp-journals-10025-1093 ◽

2014 ◽

Vol 3 (3) ◽

pp. 130-135

Author(s):

Jose M González-Méijome ◽

Antonio Queiros ◽

Alberto Diaz-Rey ◽

José Salgado-Borges ◽

Sofia C Peixoto-de-Matos ◽

...

Keyword(s):

Visual Acuity ◽

Refractive Error ◽

Case Series ◽

Advanced Case ◽

The Third ◽

History Of ◽

Ophthalmologic Examination ◽

Degrees Of Severity ◽

Irregular Astigmatism

ABSTRACT Purpose To report the clinical features of five siblings, four of them with positive diagnostic of keratoconus in different degrees of severity as well as their parents findings. Materials and methods Seven elements of the same family, five young siblings (2 males, 3 females), and their parents were screened for potential keratoconic signs. Topographic data from 60 normal eyes are also reported for comparison purposes. Complete ophthalmologic examination including biomicroscopic, topographic and refractive examination. Main outcome measures included biomicroscopic findings, refractive error and visual acuity, simulated keratometry, corneal eccentricity, indices of asymmetry and regularity. Results The more advanced case was present in the left eye of a male member, needing a rigid gas permeable lens to correct irregular astigmatism. Another brother also presented bilateral mild to moderate keratoconus with no apparent vision complaints. The third case diagnosed was one sister with history of monthly disposable soft toric lens to compensate a presumed initially regular astigmatism two years before. The remaining two cases being the older sister and one of the younger sisters presented the less noticeable signs, with confirmation of the pathology only in one of them and warranting a close follow- up of both due to the asymmetric corneal topography between both eyes as well as between the flatter superior and steeper inferior corneal areas. Conclusion This is the first reported case series involving diagnosis of keratoconus or atypical corneal topographies in several young siblings and their parents. Further evaluation of this and other cases with similar presentations might help to gain a deeper understanding on the potential genetic paths of keratoconus. How to cite this article González-Méijome JM, Peixoto-de- Matos SC, Soares A, Queirós A, Díaz-Rey A, Salgado-Borges J. Topographical Irregularity and Keratoconic Findings in Five Siblings and their Parents. Int J Kerat Ect Cor Dis 2014;3(3):130-135.

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Comparison of Refractive Results IOL Calculation Using the IV Generation Formulas in Cases of Previous Radial Keratotomy

Ophthalmology in Russia ◽

10.18008/1816-5095-2018-2s-121-125 ◽

2018 ◽

Vol 15 (2S) ◽

pp. 121-125

Author(s):

O. V. Shilovskih ◽

A. N. Ulyanov ◽

M. V. Kremeshkov ◽

E. M. Titarenko

Keyword(s):

Refractive Error ◽

Optical Power ◽

Study Group ◽

Refractive Outcome ◽

Radial Keratotomy ◽

Age Related ◽

Iol Calculation ◽

Relationship Of ◽

The Relationship ◽

Myopic Astigmatism

Purpose:Comparison of refractive results calculation of IOL optical power calculated with the IV-generation formula in patients after a previously performed radial keratotomy and to determine the relationship of these results to modern standards of error calculation of the IOL optical power in cases of age-related cataract surgery.Patients and methods. The study group consisted of patients after radial keratotomy caused by myopia and myopic astigmatism. Retrospectively data of 47 cases were analyzed (42 patients), 13 women and 29 men. The average age — 58.9 years (range 44 to 64 years). Patients were operated on the basis of the Ekaterinburg center of IRTC “Eye microsurgery” phacoemulsification through incisions not intersecting radial scars of the cornea. The calculation of the IOL optical power was performed according to IV generation formula: II Holladay (Iol consultant HicSoap Pro) and Olsen (PhacoOptics,) built-in software Scheimpflug camera Oculus Pentacam. The formula was chosen with calculation that it covers the whole spectrum range of optical cornea and front-back axle of all patients in this sample. Refractive outcome was taken into account in one month or more after surgery.Results. Refractive error in case of calculation with formula Holladay II ±0.50 diopter was in 74% cases; ±1.00 diopter — in 92%, the average refractive error in calculation with the IOL optical power was 0.5 ± 1,2 diopters. Refractive error in the calculation with the Olsen formula was ±0.50 diopters in 75%; ±1.00 diopter — in 90% cases, the average refractive error of calculation the IOL optical power was 0.4 ± 1.3 diopters.Сonclusions.Refractive results of calculating the optical power IOL in cases after radial keratotomy using the formula IV generation (Olsen — Phaco Optics and Holladay II — HicSoap Pro), provide achievement of modern standards of error in the calculation of IOLs.

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