Xm. Guo et al., LASER INTERFEROMETRIC PREDICTION OF POSTOPERATIVE VISUAL-ACUITY IN PATIENTS WITH GENETIC ECTOPIA LENTIS, Journal of pediatric ophthalmology and strabismus, 35(4), 1998, pp. 223-226
Purpose: To compare preoperative laser interference visual acuity (LIV
A) with postoperative Snellen visual acuity (SVA), and to evaluate cli
nical significance using laser interferometer in patients with genetic
ectopia lentis, Methods: We treated a series of 18 patients (34 eyes)
with genetic ectopia lentis whose visual acuity did not improve with
optical phakic or aphakic correction, or with modern microsurgery and
automated suction-cutting devices. Laser interferometry and electroret
inogram (ERG) were used for the examination of retinal function before
surgery. Results: There was not significant difference between the in
terferometric acuity before operation and the corrected visual acuity
after operation (p>0.05), and the coincidence rate between them was 80
% (27 eyes). ERG examination showed normal function in most of the pat
ients. Conclusions: The results showed that the laser interferometric
acuity is a valuable method in evaluation of postoperative visual acui
ty in patients with ectopia lentis. In six eyes, the LIVA was lower th
an the initial corrected vision postoperatively, but ERG examination s
howed that the retinal function was normal in these patients. Therefor
e, in patients with genetic ectopia lentis, LIVA combined with ERG pre
dicts visual acuity more accurately.