Table 1

Prevalence of causes of corneal blindness for the four areas of APEDS combined

	Prevalence of corneal blindness (number of participants with corneal blindness)
Cause of corneal blindness	In both eyes	In one eye	In at least one eye
Keratitis in childhood	0.062% (7)	0.176% (22)	0.238% (29)
After exanthematous fever	0.048% (6)	0.079% (11)	0.127% (17)
After non-exanthematous fever	0.014% (1)	0.008% (1)	0.022% (2)
Unknown aetiology	0	0.089% (10)	0.089% (10)
Trauma	0.009% (1)	0.176% (21)	0.185% (22)
Keratitis in adulthood	0.017% (3)	0.099% (17)	0.116% (20)
Unknown aetiology	0.003% (1)	0.099% (17)	0.102% (18)
Post leprosy	0.014% (2)	0	0.014% (2)
Post-cataract surgery	0	0.043% (5)	0.043% (5)
Aphakic bullous keratopathy	0	0.036% (4)	0.036% (4)
Severe astigmatism	0	0.007% (1)	0.007% (1)
Spheriodal degeneration	0	0.032% (4)	0.032% (4)
Pterygium related	0	0.030% (4)	0.030% (4)
Pterygium	0	0.019% (3)	0.019% (3)
Post pterygium surgery	0	0.011% (1)	0.011% (1)
Traditional eye medicine	0.013% (2)	0	0.013% (2)
Total	0.101% (13)	0.556% (73)	0.657% (86)