Other eye conditions can be linked with aniridia, some of which can be present from birth and some which may develop later in life. Not everyone with aniridia will experience all these eye conditions.
The following eye conditions can be linked to aniridia:
Nystagmus
Nystagmus is constant and involuntary movement of the eyes. This uncontrolled movement can affect how clearly a person can see and is likely to reduce their vision. Nystagmus is usually present from birth or very soon after birth.
Foveal or optic nerve hypoplasia
People with aniridia often have foveal or optic nerve hypoplasia. “Hypoplasia” is a term that refers to underdevelopment of tissue and is a condition someone is born with. The degree of “underdevelopment” can vary between different people, so how much it affects someone’s sight can vary.
Cataract
Aniridia may also cause cataracts to develop at an earlier age, often in late childhood, adolescence, or early adulthood. A cataract is a clouding of the lens, and this will cause sight to become cloudy and misty. Cataract may only affect a small part of the lens but if it starts to affect vision a lot, it may require treatment. Cataracts can be safely left untreated for many years if the vision is not badly affected.
Glaucoma
Glaucoma is an eye condition where your optic nerve is damaged by the pressure of fluid inside your eye. Damage to the optic nerve can cause glaucoma in late childhood, adolescence or early adulthood in people with aniridia. Glaucoma treatment can be given to lower eye pressure and prevent damage to the optic nerve, helping to protect sight.
Aniridic keratopathy
Keratopathy simply means an unhealthy cornea. Signs of keratopathy can start anytime from childhood onwards but tend to occur more into adulthood and middle age. Keratopathy usually starts as a ring of clouding around the edge of the cornea, but if it progresses into the centre of the cornea, vision can become hazy or blurry. Keratopathy can make the eye feel dry and uncomfortable, and lubricating eye drops may help with this.