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.