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New contrast test may offer alternative for pediatric patients

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A contrast sensitivity test called Hiding Heidi may offer an alternative for assessing low-contrast acuity in pediatric patients, a study suggests. The low-contrast “face” test had a positive correlation but significantly different readings when compared with the functional acuity contrast test and Pelli-Robson contrast sensitivity test, the study found.

Ai Hong Chen, PhD, FAAO and Diana Mohamed, BOptom, of the National University of Malaysia, used 30 university students to assess contrast acuity measurement with three methods: the Hiding Heidi low-contrast “face” test, the Pelli-Robson contrast sensitivity test and the functional acuity contrast test.

There was a positive correlation between Hiding Heidi and the Pelli-Robson test. The paired t-test showed a significant difference between Hiding Heidi and the functional acuity test at 6 cycles/degree. The Hiding Heidi test had a high repeatability.

The study is published in the October issue of Clinical & Experimental Ophthalmology.