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Maximum disparity with acuvue bifocal contact lenses with changes in illumination
J R Jiménez1, J J Durban, R G Anera
1Departamento de Optica, Facultad de Ciencias, Universidad de Granada, Spain. jrjimene@ugr.es
Purpose:
To assess the visual performance of Acuvue bifocal contact lenses at different illumination levels using a stereoscopic parameter, the maximum disparity. We compare the results with those for progressive spectacle lenses.
Methods:
We used a modified Wheatstone stereoscope and random-dot stereograms (RDS) as tests. The maximum disparity was measured for each observer at different luminance levels.
Results:
Maximum disparities did not show statistically significant differences for a wide range of luminance levels with contact lenses. The maximum disparities found when some contact-lens users wore progressive spectacle lenses were similar.
Conclusions:
The results show that the Acuvue bifocal lenses offer good performance for a near visual task, in this case the maximum disparity, for changes in illumination and are similar to that with progressive spectacle lenses.