Is Hyperopia an Important Risk Factor for PACG in the Dutch Population?-A Case Control Study

Area of Science:

• Ophthalmology
• Glaucoma Research
• Biometry

Background:

• Primary angle-closure glaucoma (PACG) is a significant cause of vision loss.
• Identifying risk factors is crucial for early detection and prevention of PACG.
• Previous studies have suggested various ocular biometrical parameters as potential risk factors.

Purpose of the Study:

• To investigate hyperopia as a risk factor for PACG in the Dutch population.
• To evaluate other biometrical parameters, including axial length (AL), anterior chamber depth (ACD), and keratometry (k) values, as risk factors for PACG.

Main Methods:

• A case-control study comparing 117 PACG patients (post-laser peripheral iridotomy) with 234 age- and gender-matched cataract patients.
• Hyperopia defined as spherical equivalent ≥+0.5 dioptres, measured using IOL Master or autorefractor.
• Statistical analysis included Mann-Whitney U tests and logistic regression to assess refractive error, ACD, AL, and k values.

Main Results:

• No statistically significant correlation was found between hyperopia (refractive error) and PACG (P = 0.068).
• Anterior chamber depth (ACD) and axial length (AL) showed a statistically significant association with PACG (P < 0.001).
• Logistic regression identified ACD as the sole significant predictor of PACG (P < 0.001), while AL was a less significant factor.

Conclusions:

• Hyperopia is not a significant risk factor for PACG in the Dutch population.
• Anterior chamber depth (ACD) is a strong predictor of PACG.
• Axial length (AL) is a less significant risk factor for PACG compared to ACD.