Aniridia refers to partial or complete absence of iris tissue in the eye. It is usually associated with poor vision due to fovea and optic nerve hypoplasia. Aniridia can be familial or sporadic.
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Congenital Cataract
The natural crystaline lens behind the pupil is largely responsible for focusing images onto the retina (tissue in the back of the eye). The natural lens should be clear and transparent. When this lens becomes cloudy it is called a cataract. This will cause permanent visual loss if it is not treated timely in children.
Childhood Glaucoma
Glaucoma is a condition which causes damage to the optic nerve of the eye due to higher than normal intraocular pressure and is relatively rare in children.
Cortical Visual Impairment/Cerebral Visual Impairment (CVI)
CVI is a condition where a reduced visual response occurs due to damage to the posterior visual system in the brain. Typically the eye structure itself is normal. CVI is one of the most common causes of severe visual impairment among children in developed countries.
Stargardt’s Macular Dystrophy
Stargardt’s Macular Dystrophy is the most common hereditary macular dystrophy with an estimated incidence of 1 in 10,000. It affects the macula, this is a specialised region of the eye that we use for seeing straight ahead and in detail. The typical person presents with visual symptoms between the first and third decades of life.
Enrolment and enquiries
Referrals to BLENNZ can come from a number of sources including: Parents, Teachers, Ophthalmologists, Health professionals, the Blind Foundation, and the Ministry of Education.
Astigmatism
Astigmatism occurs when cornea is curved more in one direction than in the other. The shape of the eye is more similar to a football than a rugby ball. The prevalence of astigmatism is highest in infancy and childhood. Rays focus at several points (in front and/or behind the retina). Near and distant vision is affected.
Appendix
People, roles and responsibilities Here is a list of the people referenced in this book, together with a definition of what they do. BLENNZ teacher (or Resource Teacher: Vision) Qualified… Read more
Keratoconus
Keratoconus is a progressive eye disease in which the normally round cornea (front window of the eyeball) thins and bulges into a cone-like shape.
Tim Bray Production Supporting inclusivity in the Arts
Each term BLENNZ Auckland North/West are given a number of free seats for the Tim Bray show at The Pumphouse in Takapuna. The theatre company allows our blind and low… Read more