It requires local examination by eye doctor. It can be trachoma, dry eye, or allergic conjunctivitis. definite ly photo phobia means cornea is involved. Clinical examination of panus, papillae in conjunctiva can confirm or rule out trachoma. since itching is absent allergy can be ruled out. for dry eye strip test can be done. History of computer or excessive TV watching may be confirmed. can start using artificial tear eye drop.