Visual acuity thresholds for cataract surgery and the changing Australian population

Area of Science:

• Ophthalmology
• Public Health
• Demography

Background:

• Cataract surgery rates (CSRs) are influenced by population demographics and visual acuity thresholds.
• Understanding these factors is crucial for effective eye care planning in Australia.

Purpose of the Study:

• To analyze the relationship between visual acuity thresholds for cataract surgery and the evolving Australian population.
• To project future demands for cataract surgery based on demographic trends.

Main Methods:

• Utilized population-based 5-year incidence data for 2594 individuals.
• Calculated age-specific prevalence of incident and existing cataract backlog.
• Estimated cataract surgery rates (CSRs) per million for various acuity thresholds over time.

Main Results:

• In 2005, age-adjusted CSRs varied significantly with acuity thresholds, ranging from 1470 (<6/60) to 6440 (<6/9), with an actual CSR of 9000.
• The CSR for a threshold of <6/12 increased threefold from 1950 to 2020, primarily due to demographic changes.
• Acuity threshold significantly impacts CSR, but demographic shifts are a major driver of increased demand.

Conclusions:

• Increasingly older populations and lower visual impairment thresholds will drive greater demand for cataract surgery.
• Eye care services must adapt future plans to accommodate these demographic changes and evolving surgical criteria.