Table 5

 Changes of best corrected visual acuity among different macular grading groups during follow up

⩾20/40 initial (10 years)20/40–20/200 initial (10 years)⩽20/200 initial (10 years)
M146 (46)0 (0)0 (0)
M2276 (242)0 (34)0 (0)
M372 (39)56 (94)0 (5)
M40 (0)41 (32)27 (36)
M50 (0)24 (5)10 (29)