The occurrence rate of lens distortion and feeling of wearing prescription spectacles

Abstract

【Purpose】 The occurrence rate of lens distortion and the feeling of wearing prescription spectacles were investigated.

【Subjects and Methods】 We investigated the spectacles prescribed at our clinic and made within one month in 190 participants. To determine the occurrence rate of lens distortion, the lens distortion was visualized using the Nicoll method and classified into degrees 0 to 3. The participants' feeling of wearing the spectacles was assessed using the Visual Analog Scale (VAS). The participants whose glasses had a degree-3 lens distortion received replaced lenses, and the VAS scores before and after the lens replacement were compared.

【Results】 The respective occurrence rates of lens distortion were 56.3% (107 cases), 29.5% (56 cases), 11.1% (21 cases), and 3.2% (6 cases) for degrees 0 to 3. The respective VAS scores (Median±SD) for the feeling of wearing the spectacles were 90±8.84, 90±9.71, 59±18.09, and 18±10.11 for degrees 0 to 3. The VAS score for the participants with a degree-3 lens distortion improved significantly from 18±10.11 to 72.5±11.16 (p＜0.01).

【Conclusion】 The feeling of wearing prescription spectacles varies depending on the frame, lenses, fitting, and so on. Our results suggested that lens distortion affects patient's feeling of wearing the glasses. Lens distortion should be considered a factor in the wearing feeling and evaluated in a clinical ophthalmic examination.