is there any treatment for this?

hi ,
my friend has a vision problem in his left eye since birth.Cause is unknown. his retina is fine, color vision is fine.. but is unable to read stuff small size text say when kept at 30cm distance. doc here says there are no corrective lenses which can help him! his right eye is normal. does any body know what the condition could be? and the treatment options ? plz help . this guy is depressed n coz of this he has not been able to seek a job though talented enough!

wow i feel for him im not sure what is is sorry but maby he should go see a docter and get some advice on his depreshion and the eye hop that helps