3.5 I Visual acuity
In the cohort overall, at last ophthalmology follow-up, visual acuity
(VA) in the best eye, was better than 20/60 for a majority of patients,
with 17 patients (40%) having 20/20 VA, and 13 (31%) with acuity less
than 20/20, but better than 20/60. Vision was severely compromised for 6
patients (14%) in the cohort, 3 with VA of 20/100 and 3 with VA 20/300
or worse. Acuity was not specified for 6 patients (14%) (4 not
recorded, 2 “fix and follow”).
Comparing right and left eye for each patient, visual acuity was the
same or similar (< 20/40 difference) in both eyes for 71%
(30/42: 15 same and 15 similar) of patients, different (difference in VA
> 20/40 < 20/120) for 10% (4/42), and very
different (difference in VA > 20/200) for the 2 eyes, for
10% (4/42) of patients.
Of the 13 patients with a formal eye exam prior to radiation, change in
VA post-RT varied without a clear pattern. At last exam, for the right
eye, acuity was worse for 5, the same for 5, and better for 3. For the
left eye, VA was worse for 4, same for 7, and better for 2 patients.