Severe visual loss (to 20/200 or worse--legal blindness), in the 4th to 6th decade
severe visual loss (to 20/200 or worse--legal blindness), in the 4th to 6th decade
Severe visual loss (to 20/200 or worse--legal blindness), in the 4th to 6th decade
severe visual loss (to 20/200 or worse--legal blindness), in the 4th to 6th decade