purpose: to determine changes in streoacuity in anisometropic myopic eyes after photorefractive keratectomy (prk). methods: this quasi-experimental clinical trial was performed in myopic patients with at least 1 d of in anisometropia spherical, astigmatic or spherical equivalent who underwent photorefractive keratectomy (prk) using the technolas 217 z excimer laser machine. changes in streoacui...

purpose : to evaluate the effect of induced esophoria and exophoria on distance stereoacuity at 6 meters methods : fifty subjects with distance corrected or uncorrected visual acuity of 6/6 and orthophoria without history of amblyopia, strabismus or any ocular pathology were recruited and distance stereoacuity was measured by howard-dolman test before and after introducing 2, 4, 6 and 8δ base i...

purpose: to evaluate the effect of age on stereopsis. methods: we evaluated stereoacuity using tno and titmus test after full correction of refractive errors in  87 randomly selected subjects aged 5-80 years. results: there was a significant relashionship between stereopsis and age such that stereoacuity increased with aging (anova, p<0.001). conculsion: stereopsis decreases with aging and ther...

OBJECTIVE To determine the effect of residual stereopsis on vision-related abilities of low vision (LV) patients with age-related macular degeneration (AMD). METHODS Prospective non-randomized observational case series. Inclusion criteria included documented AMD, LV with best corrected visual acuity (BCVA) of 20/50-20/400 in the better eye, and ages between 50 and 90 years. Stereoacuity was m...

OBJECTIVE To assess stereoacuity in a population-based sample of children and to examine ocular and systemic parameters related to stereoacuity. METHODS Using a random cluster sampling method, four- to 18-year-old children from kindergartens, elementary schools, junior high schools and senior high schools from a rural area and an urban area in the East Chinese province of Shandong were includ...

We measured stereoacuity using TNO test on 25 patients without fixation disparity (FD) and compared the result with other 25 patients exhibited FD related to visual stress. All patients were presbyopes of ages ranging from 40 to 80 years, with visual acuity 6/6 or better in each eye, free from ocular diseases and generally healthy. The results showed statistically significant difference in the ...

BACKGROUND To determine the stereoacuity threshold with a 3D laptop equipped with 3D shutter glasses, and to evaluate the effect of different shape and size of test symbols and different type of disparities to stereoacuity. METHODS Thirty subjects with a visual acuity in each eye of at least 0 logMAR and a stereoacuity of at least 32 arcsec (as assessed in Fly Stereo Acuity Test) were recruit...

In a strabismus clinic, measurement of distance stereopsis is particularly useful in the management of intermittent exotropia and esotropia of divergence paralysis type. This is mainly because reduction in the distance stereopsis is a sensitive sign of early deterioration of these strabismic disorders and generally makes a case for the surgical intervention [10]. Various tests have been used fo...

Introduction: Assessment of visual function is important for diagnosing ocular diseases. In the present study we are assessing different components functions like acuity, color vision, contrast sensitivity and stereoacuity at high altitude in Nepal. Methods: A cross- sectional quantitative was conducted Bargaun village an 3330 meters Humla district Western Detailed eye examination carried out p...