The sight test fee. Relatives at risk can have free test.
Gray
P J
PJ
D005249:Fees and Charges; D005901:Glaucoma / Q000175:diagnosis; D006801:Humans; D012017:Referral and Consultation / Q000706:statistics & numerical data; D012307:Risk Factors; D006113:United Kingdom; D014787:Vision Tests / Q000191:economics*