Aniridia
Epidemiology
1 in 60,000 people have this condition in the US
No racial predisposition exists
Diagnosis typically made at infant stage
Glaucoma diagnosed between ages 11-20
Cataracts may develop before 13 years of age
Easier to diagnose at early stages in Caucasians
Equal in males and females
Presentation
Complete or partial absence of the iris
Abnormal pupils
Reduced visual acuity (20/200 or less)
Photophobia
Other possible associated conditions
Cataracts
Glaucoma
Foveal hypoplasia
Nystagmus
Optic nerve hypoplasia
Strabismus
Albinism
Keratoconus
Ectopia lentis
Spontaneous lens dislocation
Arcus juvenilis
Microcornea
WAGR syndrome
Wilms tumor
Aniridia
Genitourinary anomolies
Mental retardation
Gillespie Syndrome
Photos
Causes
Mutation in PAX6 gene
Chromosomal deletion of p13 on chromosome 11
Mutations of AN1 and AN2 genes
Differential Diagnoses
Genetic testing for deletions/mutations in chromosomes and genes specific to the condition
Fluorescent in situ hybridization (FISH) used to detect deletions in Wilm tumor genes
Renal ultrasounds to detect tumors and anomalies of the kidneys indicative of WAGR syndrome
Congenital cataracts
Juvenile gluacoma
Ectopia lentis
Congenital nystagmus
Gillespie syndrome
Research
Postnatal manipulation of Pax6 dosage
reverses congenital tissue malformation defects
Recurrent progressive anterior
segment fibrosis syndrome following
a descemet‑stripping endothelial
keratoplasty in an infant with
congenital aniridia
Example Case
Basic Info
6 y.o. black female
MRN: 91036918
Case History
Healthy, no meds., no allergies
Born via C-section 1 month prematurely
Has twin sister
Mother has glaucoma and vision issues
2nd degree burn on face from iron at 1 y.o.
Symptoms related to aniridia
Strabismus (Esotropia)
Nystagmus
Microopthalmus
Microcornea
Cataracts
Foveal hypoplasia
Treatment
Treatment for glaucoma
Miotics
Beta-blockers
Sympathomimetics
Carbonic anhydrase inhibitors
Prostaglandin analogues
Trabeculectomy
Goniotomy
Laser therapy
Cyclocryotherapy
Cataract surgery
Treatment for poor visual acuity
Glasses
Contacts
Low vision aids
Treatment for photophobia/nystagmus
Tinted/iris contacts
Tinted glasses
Tinted IOLs (intraocular lenses)
Treatment for strabismus
Vision therapy
Surgery
Prisms
Botox