𝘐𝘳𝘪𝘴 𝘊𝘰𝘭𝘰𝘣𝘰𝘮𝘢 - Closure of the embryonic/optic fissure - completed by 6 weeks - Failure of closure of the fissure in front - formation of an iris coloboma Typical : Located in the inferonasal quadrant
Atypical : Located elsewhere
𝘛𝘺𝘱𝘦𝘴: ● Total : Whole sector of the iris upto to the ciliary body - ‘keyhole defect’ ● Partial : Do not involve whole sector of the iris - appears as notch at the pupillary margin 𝘏𝘪𝘴𝘵𝘰𝘭𝘰𝘨𝘪𝘤𝘢𝘭𝘭𝘺: ● Complete : Whole thickness of iris ● Incomplete : Either pigment epithelium or stroma are involved ● Bridge : Mesectodermal tissue forms a pupillary membrane that stretches across the defect Due to the enlarged pupillary space → inability to contract pupil properly and increased light entering the eye → sensitive to bright light/ photophobia Can be associated with early cataract No treatment if it’s an isolated finding www.ophthalmobytes.com Image from Rajan Eye Care Hospital #ophthalmology #ophthal #coloboma #iris #iriscoloboma #doctor #health #medical #vision #education #optometry #medicalstudent #optometrist #medicine #eye #ophtho #ophthalmologist #ophthalmo #med #medicaleducation #ophthalmologyresident #ophthalmologyresidency