Ocular Diseases Part 2: The IrissteemCreated with Sketch.

in blog •  9 months ago

Hello again, this topic will go over Iris defects of the eye, the Iris is the colored structure of the eye and sometimes it may look different and odd to its normal appearance, we will go over some of them:

The first defect is called Aniscoria, it is a condition where the pupils are not the same size, usually there are no abnormal effects on vision and everything else is relatively normal. The photo on the bottom also shows heterochromia which is a difference in color between the two eyes.

The second defect is called Adie's Pupil, it is a neurological disorder where one of the pupils stays dilated and/or reacts poorly to light. In the photo you actually see both eyes widely dilated, sometimes it can also affect both eyes as well.


Then we have another defect called Coloboma, is a hole or gap in the Iris, usualy it is congential and develop before birth. The bottom photo shows how the defect may look like, sometimes Coloboma is known as the "keyhole" defect as you can see below.

And lastly we have Iris Synechia, this is where the iris sticks to the cornea, usually a result of some type of inflammation or trauma to the eye.

That is all for now! Again if you have any question or suggestions please post below!
Until the next time cheers!

If you are interested in more topics, Read my previous article on ocular diseases and defects:
Ocular Diseases: part 1

Read my other topics to get more insight on anatomy of the eyes:

Structures of the Eye: part 1
Structures of the Eye: part 2
Structures of the Eye: part 3
Structures of the Eye: part 4

And also how the eye works:
How you see with your eyes: part 1
How you see with your eyes: part 2
How you see with your eyes: part 3

Thanks for the support cheers!


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This is a very informative and well researched post. Thank you for sharing.


sure glad you liked it!


It is somewhat fascinating, especially that part about the keyhole iris. I am looking up what causes that to occur. I am currently taking an organic chemistry course so I might understand how bonding works to make the body work.

Nice blog post.

Third picture is a little scary.
but the information is on fleek!