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The Change of the Phoria in Accordance with the Color and Concentration of the Color Lens  

Choi, Hyun-Soo (Department of Ophthalmic Optics, Chungam University)
Park, Sung-Jong (Department of Ophthalmic Optics, Chungam University)
Lee, Seok-Ju (Department of Optometry and Optic Science, Graduate School Dongshin University)
Jin, Moon-Seok (Department of Optometry and Optic Science, Graduate School Dongshin University)
Jun, Jin (Department of Optometry and Optic Science, Graduate School Dongshin University)
Ryu, Geun-Chang (Department of Optometry and Optic Science, Graduate School Dongshin University)
Publication Information
Journal of Korean Ophthalmic Optics Society / v.16, no.3, 2011 , pp. 339-343 More about this Journal
Abstract
Purpose: In this study, we investigated changes of phoria based on varying the color and concentration of the color in lenses. Methods: We measured distance phoria for 39 students who aged 20 to 40 with different concentrated lenes - red, gray, brown and green lenses in concentration 20%, 50% and 80%, respectively. Results: Subjects were divided into three groups which were orthophoria, esophoria and exophoria. Orthophoria in all the color and concentration, there were a few of the esophoria. Esophoria of average 2.07${\Delta}$,B.O showed that a slight increase in all colors and concentration, especially in brown lenses showed the greatest increase. Exophoria of average 3.82${\Delta}$,B.I showed that a slight decrease in all colors and concentration, especially in green lenses showed to 2.95${\Delta}$,B.I to the greatest decrease. Different concentration in same color had no specific tendency regarding phoria. Conclusions: The phoria must be considered when selecting color of the lens because of phoria is changeable by color of the lens. It is expected to study the criteria that minimize the asthenopia.
Keywords
Colored lenses; Color; Concentration; Phoria;
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