Binocularity in refractive accommodative esotropia

Comparison of Long-term Stereoacuity Improvement Between Patients With Initial Subnormal Stereopsis and Nil Stereopsis in Refractive Accommodative Esotropia

PURPOSE

To compare improvement in long-term stereoacuity between patients with refractive accommodative esotropia (RAET) with initial subnormal stereopsis (between 120 and 1,980 arcsec of stereoacuity) and nil stereopsis.

METHODS

The medical records of patients 4 years and older who had RAET with initial subnormal stereopsis and nil stereopsis and a minimum follow-up period of 5 years were retrospectively reviewed. Improvement in stereoacuity at the last follow-up visit and the factors that could influence it were compared between the initial subnormal stereopsis and the nil stereopsis groups.

RESULTS

A total of 79 patients (mean age: 6.3 ± 1.9 years) were included: 31 patients with initial subnormal stereopsis and 48 patients with nil stereopsis. The mean follow-up time was 11.7 ± 1.8 years (range: 5 to 21 years). At the last follow-up visit, a statistically significantly greater number of patients with initial subnormal stereopsis demonstrated improvement in stereoacuity and also achieved 60 arcsec of stereoacuity compared with those with nil stereopsis. Age at onset, duration of esodeviation, mean hyperopia, amblyopia, anisometropia, and follow-up duration were not significantly different between the initial subnormal stereopsis and the nil stereopsis groups. The initial mean near and distance deviations with hyperopic correction were significantly smaller in patients with initial subnormal stereopsis. A significantly greater number of patients with initial sub-normal stereopsis had fusion at distance.

CONCLUSIONS

Patients with RAET with initial subnormal stereopsis have greater chances of stereoacuity improvement and recovery of 60 arcsec of stereoacuity than those with nil stereopsis. Patients who initially have nil stereopsis may develop normal stereoacuity. Smaller initial deviations with hyperopic correction and fusion at distance indicate a favorable prognosis for stereoacuity improvement. [J Pediatr Ophthalmol Strabismus. 2022;59(4):248-253.].

Stereoacuity outcomes following surgical correction of the nonaccommodative component in partially accommodative esotropia

BACKGROUND

Previous studies of partially accommodative esotropia (PAET) have assessed factors requiring surgery and alignment outcomes. The purpose of the present study was to additionally evaluate stereoacuity in patients who required surgery for their nonaccommodative component.

METHODS

The medical records of consecutive patients with PAET who underwent bilateral medial rectus recession from April 1990 to July 2010 to treat the nonaccommodative component were reviewed retrospectively. Preoperative data included visual acuity, stereoacuity, cycloplegic refraction, deviation at distance and near, and age at surgery. The primary outcomes were stereoacuity and alignment.

RESULTS

A total of 84 patients were included. Stereopsis by the Titmus StereoTest was demonstrated in 51 (61%) by the final visit. The average follow-up time was 4.4 ± 2.8 years (range, 0.8-11.0 years). Fine stereopsis (100 arcsec or better) was appreciated in 29 patients (35%, 57% of those with stereopsis). Of those with residual esotropia, 11 (50%) demonstrated stereopsis, and 7 (32%) appreciated fine stereoacuity. No exotropic patient had stereopsis. There was a statistically significant correlation between age at time of surgery and stereopsis at 1 year (ρ = 0.233; P = 0.033) but not at the final visit (ρ = 0.106, P = 0.34). Of the 84 patients, 56 (67%) had a favorable alignment (within 10^Δ of orthotropia) at the final visit; 22 (26%) had residual esotropia; and 6 (7%) had consecutive exotropia.

CONCLUSIONS

In this subset of esotropic patients who required surgery for their nonaccommodative component, favorable sensory outcomes can be achieved. Furthermore, favorable stereoacuity can be found even when there is a residual esodeviation.