The Scottish RD survey 10 years on: the increasing incidence of retinal detachments.

Background: The Scottish RD Survey reported an incidence of 12.05/100,000/yr in 2009. Data published from Denmark recently confirmed a 50% increase in RD presentations over the last 16 years. We set out to repeat the Scottish RD survey to determine if a similar trend has been observed in Scotland.

Methods: All 16 Scottish VR surgeons, who make up the collaboration of Scottish VR Surgeons (SCVRs) were asked to prospectively record all primary RDs presenting from 12th August 2019 to 11th August 2020. For consistency, the case definitions were the same as for the 2009 Scottish RD Survey. Basic demographic and clinical features were recorded. Age specific incidence was calculated from mid-year population estimates for 2019 obtained from the National Records of Scotland.

Results: There were 875 RRDs recorded, which gives an updated incidence of 16.02/100,000/year in Scotland. 62.8% occurred in males and the greatest increases were seen in males aged 50-59 (p = 0.0094), 60-69 (p = 0.0395) and females aged 40-49 (p = 0.0312) and 50-59 (p = 0.0024). The proportion of pseudophakic RRDs in this study is 29.4% (253/860). Compared to the 21.6% in the 2010 study, this represents a 28% increase (χ = 11.03, p = 0.0009). The proportion of macula-off RRDs remained generally stable at 58%.

Conclusion: Our study confirms that RRD is becoming more common in the UK, reflecting almost identical findings from Denmark. This trend is in part due to increasing myopia, increasing pseudophakia, and possibly other factors. This should be considered when planning VR services and allocating resources in the future.