Cardiff Adult Contrast Sensitivity Test                                                  View Shopping Cart

                                                                                      

Contrast sensitivity is the ability of the visual system to detect large but faint targets.There are some pathological conditions that reduce contrast sensitivity without impairing visual acuity, and the test will help in the identification of these conditions.

However, reduced contrast sensitivity and reduced visual acuity often occur together, so that some patients with visual impairment also have reduced contrast sensitivity. Tests for the two functions are therefore complementary and obtaining a measure of both will give a fuller description of visual deficits than will one alone.

The test covers 12 Contrast levels using three Cards at each per level (36 cards total). Contrast levels start at 46% and decrease to 1% (Sensitivity levels from 2.17 to 100.) When the Cardiff Contrast Test is carried out at a distance of 50 cm the targets represent 1.9 cycles per degree (or 6/90, 20/300) and at a distance of 1 m the targets represent 3.8 cycles per degree (or 6/45, 20/150). The contrast levels are in line with the Pelli-Robson test, and study suggests comparable results.

   

Card	Picture	Contrast %	Contrast Sensitivity
A	Key	46	2.17
B	Clock	32	3.13
C	hanger	22	4.55
D	phone	16	6.25
E	teacup	12	8.33
F	plane	8	12.5
G	ball	6	16.67
H	hanger	4	25
I	clock	3	33.33
J	phone	2	50
K	key	1.5	66.66
L	teacup	1	100

 

4925R   Cardiff Adult Contrast Sensitivity Test Set .......... $1,500.00

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