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New paediatric contrast test: Hiding Heidi low‐contrast ‘face’ test
Author(s) -
Chen Ai Hong,
Mohamed Diana
Publication year - 2003
Publication title -
clinical and experimental ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.3
H-Index - 74
eISSN - 1442-9071
pISSN - 1442-6404
DOI - 10.1046/j.1442-9071.2003.00691.x
Subject(s) - contrast (vision) , repeatability , medicine , test (biology) , mathematics , physics , optics , statistics , biology , paleontology
Background: The Hiding Heidi low‐contrast ‘face’ test is a new paediatric contrast test to evaluate the ability to detect objects with low contrast. The purpose of the present study was to compare the Hiding Heidi low‐contrast ‘face’ test (HH) with the Pelli−Robson contrast sensitivity test (PR) and the functional acuity contrast test (FACT) in the low‐contrast assessment. Methods: Thirty university students participated in the present study. The contrast ability was evaluated by using three different methods: HH, PR and FACT. The HH was repeated on two separate occasions to test the repeatability. Results: There was a significant positive correlation between HH and PR ( r = 0.65, P < 0.01); between HH and FACT at 6 cycles per degree (c.p.d.; r = 0.64, P < 0.01); between HH and FACT at 3 c.p.d. ( r = 0.91, P < 0.01); and between HH and FACT at 1.5 c.p.d. ( r = 0.56, P < 0.01). The paired t ‐test showed a significant difference between HH and PR ( t = −6.05, P < 0.01); between HH and FACT at 6 c.p.d. ( t = −11.16, P < 0.01); between HH and FACT at 3 c.p.d. ( t = −8.35, P < 0.01); and between HH and FACT at 1.5 c.p.d. (t = −5.64, P < 0.01). They had good agreement. The HH had a high repeatability. Conclusions: The HH had a positive correlation but produced significantly different readings when compared with FACT and PR. The features and role of HH in clinical contrast sensitivity assessment are discussed.