Deaf-Blindness refers to the loss of both vision and hearing. Vision or hearing losses may vary from person to person. Hearing loss may occur at birth or develop later in life from a variety of cases such as infection, injury or natural aging. Someone experiencing hearing loss may find it difficult to follow a conversation or distinguish a voice from background noise. Similarly, loss of sight may occur at birth or develop gradually from eye conditions such as cataracts, glaucoma and retinopathy. Loss of sight may cause eye pain, blurred vision, reduced night vision and sensitivity to bright lights. A physician can diagnose deaf-blindness through routine eye and ear examinations. Treatments for some eye conditions are available and may include eye drops or laser surgery. Many helpful devices and educational tools exist to aid people experiencing deaf-blindness, including hearing aids, microphones, special glasses, sign language and the Braille writing system. Furthermore, affected individuals go on to live full and healthy lives.