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CORNEA
Long-term visual prognosis in children after corneal transplant surgery for Peters
anomaly type I.
Zaidman GW, Flanagan JK, Furey CC.
Am J Ophthalmol. 2007 Jul;144(1):104-108.
PURPOSE: To evaluate the long-term visual prognosis in children with corneal
transplant surgery for Peters anomaly type I.
METHODS: Twenty-four children treated in a university-based practice were divided
into two groups for analysis: a younger preverbal group and an older group of children
three years of age or older. Children underwent corneal transplantation surgery
(penetrating keratoplasty [PKP]) for Peters anomaly type I as infants (age range, two to
18 months). Visual acuity using Snellen or Allen charts and glaucoma and other
complications were tabulated.
RESULTS: Twenty-four patients had Peters anomaly; 16 had unilateral disease, eight
had bilateral disease. Thirty eyes underwent PKP. Average age at PKP was five
months. The mean follow-up from PKP to the most recent visit was 78.9 months. Fifteen
eyes (50%) were treated for glaucoma. Five transplants (17%) had graft rejection
episodes; two of these failed and were regrafted. Six eyes (20%) required cataract
surgery. One eye had a retinal detachment. Currently, 27 eyes (90%) have clear grafts.
In the younger group of children, five of six grafts are clear (83%). In the older group of
24 eyes of verbal children, seven eyes (29%) have visual acuity ranging from 20/20 to
20/50, six (25%) have visual acuity ranging from 20/60 to 20/100, nine (38%) have
visual acuity ranging from 20/200 to counting fingers, and two eyes (8%) have visual
acuity of hand movements. In this group, nine of 12 eyes without glaucoma had visual
acuity better than 20/100; only four of 11 eyes with glaucoma were better than 20/100.
CONCLUSIONS: Many children with PKP for Peters anomaly type I can experience
good or functional vision in their operated eye. Children with glaucoma have a poorer
visual prognosis.
A method for noncontact measurement of corneal diameter in children.
Lagrèze WA, Zobor G.
Am J Ophthalmol. 2007 Jul;144(1):141-2.
PURPOSE: To evaluate a new method for measuring corneal diameter in children.
METHODS: With a digital camera set at maximum focal distance, the authors
photographed 92 children twice, each with a paper ruler taped to his or her forehead.
Images were opened on a personal computer and the lower half of each eye was cut
out and dragged to the ruler to record corneal diameter. The coefficient of variation was
calculated for each eye, and nonlinear regression analysis used to correlate diameters
with age.
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