[A new device for measuring contrast sensitivity with and without glare]

Area of Science:

• Ophthalmology and Vision Science
• Optometry
• Gerontology

Background:

• Contrast sensitivity is a crucial visual function impacting daily activities.
• Age-related changes in vision, including contrast sensitivity, are well-documented.
• The effect of glare on photopic vision requires further investigation with novel tools.

Purpose of the Study:

• To evaluate photopic contrast sensitivity using the novel Contrast Glaretester CGT-1000.
• To assess the impact of glare on contrast sensitivity in young and middle-aged adults.
• To investigate age-related differences in contrast sensitivity with and without glare.

Main Methods:

• Photopic contrast sensitivity was measured in 78 eyes of 78 participants (49 young adults, 29 adults aged 35-55).
• The Contrast Glaretester CGT-1000 (Takagi, Japan) was employed, utilizing an automated strategy for 6 spatial frequencies.
• Measurements were taken with and without glare conditions.

Main Results:

• Contrast sensitivity values obtained with the CGT-1000 were comparable to existing clinical tests.
• A significant decrease in contrast sensitivity was observed with increasing age, both with and without glare.
• Glare exposure did not significantly alter contrast sensitivity under photopic conditions.

Conclusions:

• The Contrast Glaretester CGT-1000 is a reliable instrument for measuring photopic contrast sensitivity.
• Age is a significant factor affecting photopic contrast sensitivity, independent of glare.
• Glare does not appear to be a major confounding factor for photopic contrast sensitivity in this age range.