Evaluation of Change in Stereopsis with Age in Normal Eyes

Autor: Gurvinder Kaur, Amruth Lal Yellamelli, Anu Liza Joy
Rok vydání: 2020
Předmět:
Zdroj: Journal of Evidence Based Medicine and Healthcare, Vol 7, Iss 2, Pp 97-101 (2020)
ISSN: 2349-2570
2349-2562
DOI: 10.18410/jebmh/2020/21
Popis: BACKGROUND Stereopsis is the ability to perceive the depth of field based on the disparity of the images formed by the two eyes; in other words, the fusion of the separated images on the Panum's area in order to form binocular single vision. Depth perception is very important in everyday life tasks such as driving, orientation in space while moving (e.g. descending a flight of stairs) and for fine-motor tasks involving hand eye coordination such as threading a needle. By reducing the amount of scanning necessary to extract spatial information, stereopsis facilitates comprehension of complex visual experiences. While stereopsis is a uniquely binocular phenomenon, there are many monocular clues which can provide information on depth including linear perceptive, shadows, texture and gradients. We wanted to study the change and variation of stereopsis with age in normal eyes. METHODS This prospective study was conducted on the participants attending the Outpatient Department of the Department of Ophthalmology of our hospital. A total of 80 subjects (patients/ their relatives) aged between 7 and 80 years, were included in the study. Informed consent was taken from all the participants. Subjects with strabismus, amblyopia, anisometropia (difference of ≥ 2.5D between both eyes), glaucoma, cataract and with age related macular degeneration and patients with history of eye surgery were excluded from the study. Stereopsis was assessed by TNO random dot stereotest (TNO Test). The participants read the test plates at a distance of 40 cm, wearing polaroid spectacles or red-green goggles, under proper illumination and after correction for any refractive error. RESULTS Data was entered in EpiData entry and analysed using EpiData analysis software v. 3.0. Significance was set at p
Databáze: OpenAIRE
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