any opticians or eye specialists about?

[whoopsfallenoveragain]

ds (5) had his school entry review check she has marked that the vision in his right eye is 6/6 but his left is 6/9 can any one tell me what that means?
He has been refered to see the gp rather than an optician for this too

bump

Email me via 'contact a mumsnetter' whoops if you still need to know about this. DH is a consultant eye surgeon