Risk of Depression in Persistent Blue Light Deprivation after Cataract Surgery: A Population-Based Cohort Study

Area of Science:

• Ophthalmology
• Psychiatry
• Public Health

Background:

• Blue light influences emotional responses and affective arousal.
• Blue light-filtering intraocular lenses (BLF IOLs) reduce blue light exposure post-cataract surgery.
• The long-term impact of BLF IOLs on mental health, specifically depression risk, requires investigation.

Purpose of the Study:

• To assess the association between BLF IOLs and the risk of developing depressive disorders.
• To investigate whether persistent blue light deprivation from BLF IOLs correlates with depression.
• To identify specific demographic groups potentially more vulnerable to depression after BLF IOL implantation.

Main Methods:

• Population-based cohort analysis using South Korean National Health Insurance data.
• Comparison of individuals with BLF IOLs versus clear IOLs implanted within one year.
• Cox proportional hazards model used to calculate incidence rates and adjusted hazard ratios for depressive disorders.

Main Results:

• Individuals with BLF IOLs showed a significantly higher incidence rate of depressive disorders (27.8 per 1000 person-years) compared to those with clear IOLs (24.1 per 1000 person-years).
• BLF IOL recipients had a 1.16-fold increased risk of depressive disorders (HR, 1.16; 95% CI, 1.09-1.23).
• Increased depression risk was particularly noted in women (HR, 1.17) and individuals aged 50-64 (HR, 1.30).

Conclusions:

• BLF IOLs are associated with an elevated risk of depressive disorders compared to clear IOLs.
• Prolonged reduction in blue light exposure via BLF IOLs may contribute to increased depression risks.
• Women and specific age groups (50-64 years) appear more susceptible to depression following BLF IOL implantation.