Posters

The 3D near-vision test for near vision examination in young candidate for the Italian military force without polarised glasses: first applications for the evaluation of the level of stereopsis

Poster Details

First Author: D.Borroni ITALY

Co Author(s):    L. Marino   M. Ferronato   P. Sivelli   D. Micochero           

Abstract Details

Purpose:

Vision screening and eye examination are vital for the detection of conditions that suppress the normal visual image and may lead to inadequate performances and blindness in soldiers. Up to date one of the most common methods to evaluate binocular stereoacuity were the TNO and Butterfly stereoacuity tests where the use of polarized glasses is mandatory. In this study we evaluated the new 3D-Vision System by REALVISION Srl that doesn't need the use of eye glasses.

Setting:

Istituto Europeo Occhio Secco - Lugano-Milano

Methods:

This was a cross-sectional study evaluating the REALVISION KIT NEAR by REALVISION Srl. In acquired strabismus and normal subjects. The inclusion criteria were subjects aged 18 years and above, best corrected visual acuity (BCVA) of 0.3 or better in each eye at the time of examination, and neurologically and developmentally normal. We included 27 candidate with anisometropia, divided into groups with amblyopic anisometropia (AA n = 10) and non-amblyopic anisometropia (NA n = 12). Subjects without anisometropia were enrolled in the control group (n = 5). Main outcome measures were the level of stereopsis and sensory fusion.

Results:

The degree of anisometropia in the NA, AA, and control groups was 2.34 diopters (D), 3.11 D, and 0.20 D, respectively (P = 0.014). Stereopsis (arcsec) was significantly worse in the AA group than the NA and control groups (618.71, 70.26, 49.52, respectively, P < 0.001), while no significant difference was found between the NA and control groups. The rate of fusion was significantly lower in the AA than the NA group (13.1% vs. 61.2%, P < 0.001), and was significantly lower in the NA than the control group (61.2% vs. 71.6%, P = 0.001).

Conclusions:

The levels of stereopsis and sensory fusion with anisometropic glasses were significantly worse in the AA than in the NA group. The level of stereopsis in the NA group did not differ significantly from that in the isometropic control and the rate of fusion was significantly lower. The REALVISION KIT NEAR gives the possibility to objective evaluate the level of stereopsis.

Financial Disclosure:

None