New paediatric contrast test: Hiding Heidi low-contrast 'face' test.

Area of Science:

• Ophthalmology
• Vision Science
• Pediatric Optometry

Background:

• The Hiding Heidi low-contrast 'face' test (HH) is a novel pediatric tool for evaluating low-contrast object detection.
• Assessing contrast sensitivity is crucial for visual function evaluation.

Purpose of the Study:

• To compare the Hiding Heidi low-contrast 'face' test (HH) with established contrast sensitivity tests: Pelli-Robson (PR) and Functional Acuity Contrast Test (FACT).
• To evaluate the clinical utility and performance of the HH test in low-contrast assessment.

Main Methods:

• Thirty university students underwent contrast ability evaluation using HH, PR, and FACT.
• The HH test was administered twice to assess its repeatability.

Main Results:

• Significant positive correlations were found between HH and PR (r=0.65), and HH and FACT across various cycles per degree (1.5 c.p.d.: r=0.56; 3 c.p.d.: r=0.91; 6 c.p.d.: r=0.64).
• Paired t-tests revealed significant differences between HH and PR (t=-6.05), and HH and FACT at all tested c.p.d. (1.5: t=-5.64; 3: t=-8.35; 6: t=-11.16).
• The HH test demonstrated high repeatability and good agreement with other measures, despite significant differences in readings.

Conclusions:

• The Hiding Heidi test correlates with Pelli-Robson and Functional Acuity Contrast Test but provides distinct readings.
• The study discusses the unique features and clinical role of the HH test in contrast sensitivity assessment.