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The Evaluation of Visual Quality by Employing Double-pass Principle in Circle Contact Lens Wearers after Refractive Surgery
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 Title & Authors
The Evaluation of Visual Quality by Employing Double-pass Principle in Circle Contact Lens Wearers after Refractive Surgery
Kwon, Ki Nam; Kim, So Ra; Park, Mijung;
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 Abstract
Purpose: The study aimed to evaluate the effect of circle contact lens wearing on visual quality of the eyes after a refractive surgery. Methods: The objective visual quality was evaluated for 40 eyes who did not get refractive surgery and 30 eyes who got a refractive surgery after applying plano circle contact lenses on their eyes, respectively. Modulation transfer function (MTF), objective scatter index (OSI) and the focusing ratio on retina (Strehl ratio) were measured by using optical quality analysis system (OQAS) and the correlation between pupil size and objective visual quality was analyzed by measuring the pupil size. Results: When wearing circle contact lens on the eyes after refractive surgery, MTF and Strehl ratio were reduced and OSI was increased compared with the eyes without refractive surgery. The eyes after a refractive surgery showed more significant difference changes in MTF, OSI and Strehl ratio according to the pupil size compared with those without refractive surgery. Conclusions: The results showed that wearing of circle contact lens after the refractive surgery has deteriorated the objective visual quality based on the quality of focused image on the retina. Therefore, we suggest that sufficient understanding and consideration about the deterioration of visual quality is necessary in the case of circle contact lens wearing after refractive surgery.
 Keywords
Circle contact lens;Refractive surgery;Modulation transfer function;Objective scatter index;Strehl ratio;Pupil size;
 Language
Korean
 Cited by
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