InfantSee, a free eye exam program of the American Optometric Association, has resulted in the detection of numerous eye disorders, including retinoblastoma, an eye cancer that most commonly occurs in young children. One possible symptom is increasing hyperopia in the early years, a stage of life when farsightedness usually decreases. Another possible sign is anisometropia. This condition means that the eyes “have a different refractive power (prescription for correction), so there is unequal focus between the two eyes,” according to the American Association for Pediatric Ophthalmology and Strabismus. (Anisometropia can also occur due to other more common issues, such as amblyopia, or lazy eye.) The advice offered to eye care providers in Primary Care Optometry News is that “When your refractive error findings disagree with the expected norms, consider a mass such as a retinoblastoma and follow up with a careful dilated exam and possibly specialty referral. You may safe an eye or even a life.” Read more about this: Some refractive errors may suggest retinoblastoma in infants.