A 7-year-old girl presented with decreased vision in the right eye that was detected during school screening. The best corrected visual acuity was 20/40 in the right eye and 20/20 in the left eye. Examination of the right eye revealed a clear cornea with Y-shaped lenticular opacities diagnostic of a sutural cataract. When the eye was examined through a slit lamp with diffuse illumination, the opacities followed the anterior and posterior Y sutures of the lens, with the anterior suture having the shape of an upright Y and the posterior suture having the shape of an inverted Y. Sutural cataracts are congenital lens opacities that affect the Y sutures of the nucleus of the fetal lens; typically, sutural cataracts do not progress. They have been described in association with nuclear, pulverulent, cerulean, and lamellar cataracts but rarely require intervention when detected as an isolated finding, because the effects on vision are minimal. Eyeglasses were prescribed for this patient, with marginal improvement in the vision of her right eye to 20/30.
Check out the snellen and kindergarten tests to improve your knowledge of how to calculate the visual acuity for those who are interested.