Signs and symptoms of retinoblastoma include:

• an unusual white reflection in the pupil – this may be apparent in photos where only the healthy eye appears red from the flash, or you may notice it in a dark or artificially lit room
• a squint
• a change in the colour of the iris – in one eye or sometimes only in one area of the eye
• a red or inflamed eye – though your child won’t usually complain of any pain
• poor vision – your child may not focus on faces or objects, or they may not be able to control their eye movements (this is more common when both eyes are affected); they may say that they can’t see as well as they used to

These symptoms may be caused by something other than retinoblastoma.

It’s unusual for retinoblastoma to progress unnoticed beyond the age of 5. Signs in older children include the eye appearing red, sore or swollen, and some loss of vision in the affected eye.