Shar Pei are one of the breeds that can suffer from PLL (Primary Lens Luxation) although this usually shows up around the age of 3 - 5 years. The only way to know for sure is to have your dog eye tested by a specialist opthalmologist, your vet will be able to put you in touch with a vet who does clinics in your area.
Here is a link to a site which explains the condition, although your dog does not necessarily have this, but I would get his eys tested anyway to be safe.
http://www.kavishi.freeserve.co.uk/lensluxatio naddition2.htm
The Animal Health Trust at Newmarket are doing research to find the gene responsible for this condition, which is hereditary. Once they find the gene, there will be a test which you can have done to tell you whether your dog will be affected, clear or a carrier of the disease. Many breeds are affected, including a lot of terrier breeds, border collies, tibetan terriers, lancashire heelers and shar pei, to name a few. It can be very painful if not treated.