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Proceedings Paper

Estimation of stereovision in conditions of blurring simulation
Author(s): Gunta Krumina; Maris Ozolinsh; Ivars Lacis; Vsevolod Lyakhovetskii
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Paper Abstract

The aim of this study was to evaluate the simulation of eye pathologies, such as amblyopia and cataracts, to estimate the stereovision in artificial conditions, and to compare the results on the stereothreshold obtained in artificial and real- pathologic conditions. Characteristic of the above-mentioned real-life forms of a reduced vision is a blurred image in one of the eyes. The blurring was simulated by (i) defocusing, (ii) blurred stimuli on the screen, and (iii) occluding of an eye with PLZT or PDLC plates. When comparing the methods, two parameters were used: the subject's visual acuity and the modulation depth of the image. The eye occluder method appeared to systematically provide higher stereothreshold values than the rest of the methods. The PLZT and PDLC plates scattered more in the blue and decreased the contrast of the stimuli when the blurring degree was increased. In the eye occluder method, the stereothreshold increased faster than in the defocusation and monitor stimuli methods when the visual acuity difference was higher than 0.4. It has been shown that the PLZT and PDLC plates are good optical phantoms for the simulation of a cataract, while the defocusation and monitor stimuli methods are more suitable for amblyopia.

Paper Details

Date Published: 13 June 2006
PDF: 10 pages
Proc. SPIE 5946, Optical Materials and Applications, 59461N (13 June 2006); doi: 10.1117/12.639410
Show Author Affiliations
Gunta Krumina, Univ. of Latvia (Latvia)
Maris Ozolinsh, Univ. of Latvia (Latvia)
Ivars Lacis, Univ. of Latvia (Latvia)
Vsevolod Lyakhovetskii, St. Petersburg Electrotechnical Univ. (Russia)

Published in SPIE Proceedings Vol. 5946:
Optical Materials and Applications
Arnold Rosental, Editor(s)

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