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Analysis of the Optical Characteristics of Clip-on Mirror Sunglasses According to Vision Between Lenses
New Phys.: Sae Mulli 2018; 68: 249~255
Published online February 28, 2018;
© 2018 New Physics: Sae Mulli.

Dong Hyuk KIM, Hyun Mee LEE*

Department of Optometry & Vision Science, Catholic University of Daegu, Gyeongsan 38430, Korea
Correspondence to:
Received October 20, 2017; Revised December 7, 2017; Accepted December 14, 2017.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
In this study, the contrast sensitivity was analyzed using the difference in interval between lenses for regular mirror sunglasses and clip-on sunglasses with different visions of the lens between the front and the back, and optical characteristics were compared and analyzed from the colors of the mirror lens. Seventy people wore clip-on mirror lenses with different intervals between the front and the back, 1.4 mm and 6.7 mm, and the intensity of the illumination and the color of the mirror lens were changed to measure contrast sensitivity. The contrast sensitivity of the clip-on sunglasses was lower than that of the ordinary mirror sunglasses with only one lens. The contrast sensitivity at high illumination was higher than at low illumination. The contrast sensitivity of the clip-on glasses was better for a narrower lens spacing. No difference in contrast sensitivity between the four colors coated on the mirror lens was observed.
PACS numbers: 42.79.Bh, 42.15.Eq
Keywords: Clip-on glasses, Mirror sunglasses, Contrast sensitivity, Color distinctions, Illumination

February 2018, 68 (2)
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