The Iris Thickness in a Healthy Saudi Population
Yasir H Ziaul1, Alka Mahale1, Sejo Varghese1
1Research, King Khaled Eye Specialist Hospital, Riyadh, SAU.
Cureus
|February 10, 2021
Summary
Iris thickness in healthy Saudi adults varies by gender and refractive error. These baseline measurements are crucial for understanding angle closure glaucoma risk in the Arab population.
Area of Science:
- Ophthalmology
- Anatomy
- Glaucoma Research
Background:
- Iris thickness (IT) is a known risk factor for angle closure glaucoma.
- Previous studies have not evaluated IT in the normal Saudi population.
Purpose of the Study:
- To quantitatively evaluate iris thickness in healthy Saudi eyes.
- To establish baseline IT data for the Saudi population.
- To assess factors influencing IT, such as age, gender, and refractive error.
Main Methods:
- Anterior segment optical coherence tomography (ASOCT) was used to measure IT and iris volume.
- Measurements were taken under light-on (LON) and light-off (LOFF) conditions.
- IT was measured at 500 µm (IT500) and 750 µm (IT750) from the scleral spur (SS), nasally and temporally.
Main Results:
- Iris thickness was significantly greater at 750 µm compared to 500 µm, both nasally and temporally, under light-on and light-off conditions.
- Iris thickness was significantly greater in males compared to females.
- Variations in iris thickness were significant across different refractive errors but not by age.
- Pupil diameter and anterior chamber depth decreased with age.
Conclusions:
- Baseline iris thickness data in Saudi eyes were established.
- These findings provide a reference for comparing IT in Saudi individuals with and without angle closure glaucoma.
- Iris thickness is influenced by gender and refractive error in the Saudi population.
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