Symptoms of eye cancer vary depending on the type of cancer and where it's located. Intraocular cancers such as ocular melanoma have no symptoms but are usually detected in routine eye exams. This is why it's important to have an eye test every 2yrs. Some eye cancers can cause symptoms incl partial or complete loss of vision, seeing flashing lights or spots, a dark spot on your iris that grows, a visible lump on your eyelid with crusting or bleeding, pain in or around the eye(rare), a bulging eye or watery eyes. Most children with retinoblastoma look well, but parents may notice a squint or an odd looking pupil. The pupil may be white in flash photography rather than showing a red eye.
Attribution: BUPA