Prevalence Flashcards
Why isn’t prevalence useful with px’s with cataract?
Because the development of cataracts are a normal part of ageing that everyone endures at some point
Why are prevalence figures in cataracts useful?
It’s useful for planning resources and cost and availability of cataract surgery and the impact of cataract surgery on px’s quality of life
What is a complication of how cataract defined?
At what point along a lens opacity and sx severity or visual function should a px be included in prevalence figures
What does it mean if a cataract is deemed ‘visually significant’?
Va being less than 6/12 and a grading of the degree of lens opacity
What makes it easier to categorise cataract prevalence?
To categorise cataracts in age brackets who are more likely to suffer cataracts and also px’s that have undergone cataract surgery
How many px’s (%) of over 65s have either a visually significant cataract or have undergone surgery?
35%
What’s the prevalence of cataracts in the age group of 65-70?
16%
What is the prevalence of cataracts in the age range of Over 85s?
70%
Which is the most prevalent cataract?
Cortical
How much more prevalence is the cortical cataract compared to the other cataracts?
4x
Which cataract is the least common?
Psc
Why does psc have the highest amount of surgical interventions?
Because psc’s are most likely to give debilitating sx’s in the early stages
As the population ages, what can we expect?
We can except prevalence to increase and surgical interventions to increase
Why are cataract surgeries now a possibility ?
Because there’s an improvement in surgical outcomes
