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Contrast Sensitivity Function of Sound Eye after Occlusion Therapy in the Amblyopic Children

 Helen Lew  ;  Sueng-Han Han  ;  Jong-Bok Lee  ;  Eun-Seok Lee 
 YONSEI MEDICAL JOURNAL, Vol.46(3) : 368-371, 2005 
Journal Title
Issue Date
Amblyopia/physiopathology* ; Amblyopia/therapy* ; Child ; Contrast Sensitivity* ; Humans ; Orthoptics ; Visual Acuity
Amblyopia ; intermediate spatial frequencies ; mesopic contrast sensitivity function
To verify the changes of mesopic and photopic contrast sensitivity function of sound eye whose visual acuity was kept the same after occlusion therapy in the amblyopic children. Fourteen sound eyes of amblyopic children (mean; 7.67 years; S.D., 1.50 years) who kept their visual acuity the same after the occlusion therapy were tested. The children had 6 hours of part-time patch therapy for 3 months prior to this examination. Among 14 amblyopic children, 8 were anisometric and 6 were strabismic amblyopes. Using the visual capacity analyzer which measures the minimal contrast level at from low to high spatial frequencies, the contrast sensitivity of sound eye was measured, under both photopic and mesopic condition, before and after 3 months of occlusion therapy. Comparing the contrast sensitivity of sound eye after the occlusion therapy to that before the occlusion, there was no statistical difference in photopic condition. When it comes to mesopic condition, the contrast sensitivity decreased at the intermediate spatial frequency level (3-13 c.p.d, p=0.028) after the occlusion therapy. The occlusion caused statistically significant decrease in mesopic contrast sensitivity, when the visual acuity was not changed after the occlusion therapy. It may indicate that mesopic contrast sensitivity can be considered as a useful tool for early detection of hidden occlusion amblyopia.
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1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
Lee, Eun Suk(이은석)
Lee, Jong Bok(이종복)
Han, Seung Han(한승한) ORCID logo https://orcid.org/0000-0001-8972-4790
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