Contrast sensitivity (CS) is a fundamental aspect of vision. Its measurement provides useful independent information in relation to a patient’s visual function, which may not be revealed by visual acuity (VA).
1 2 3 4 5 There is considerable evidence that it is a strong predictor of real-world performance, providing insight into a patient’s disability and quality of life.
6 Specifically, studies have shown a significant relationship between CS and driving performance,
7 mobility and walking speed,
8 postural stability and falls,
9 10 face recognition,
11 reading speed,
12 13 computer task accuracy,
14 and ability to perform activities of daily living.
15 16 Furthermore, there is evidence to suggest that CS measurement may have some value in the detection and progression of ocular diseases, such as cataract,
17 glaucoma,
2 18 age-related macular degeneration (AMD),
19 20 diabetic retinopathy,
21 and optic neuritis.
22 CS tests have been useful for evaluating cataract surgery,
23 YAG laser capsulotomy,
24 intraocular lenses,
25 26 medications and surgery for glaucoma,
27 28 verteporfin and radiation therapy for AMD,
29 laser photocoagulation and pharmaceutical therapeutics for diabetic retinopathy,
30 31 contact lens use,
32 and laser refractive surgery.
33 Thus, the measurement of CS has substantive importance and value in vision research and clinical care.