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Eye doctors have you confused? Have you been prescribed eye drops, but you’re unsure of their purpose? Diagnosed with an eye disease but don’t know what that means?

The Root Eye Dictionary is a book that explains complex eye terminology in understandable layman’s terms. Plus, it’s free to download (or read online by scrolling down). The printed version is available for order on amazon via the link below.

header-index JUMP TO LETTER: A B C D E F G H I K L M N O P R S T U V W X Y Z header-a









header-j Sorry. I couldn’t think of any good eye words with the letter J. header-k






header-q I couldn’t think of anything. header-r








As you can see … this website is still being constructed. I’ve got all the terms up and running, however there are still a couple of additions I’ll be adding over the next two months:

1. Downloadable PDF of the Book
2. Print Version

If you’d like to be updated on when these things come out, sign up to my mailing list here. Thanks so much!
Tim Root

Comment by Timothy Root, M.D. — May 5, 2013

What is the name of the eye problem where the cornea keeps making new layers as it does in utero, so it has many layers like an onion, throughout life. My son has this and I would like more info about it but don’t know the medical term.

Comment by Juanita Causey — August 26, 2013

You are probably referring to EBMD (epithelial basement membrane dystrophy) which is also commonly called map-dot-fingerprint dystrophy. Run a google or youtube search and there is a lot of information available.

It is fairly common, but I didn’t include it in the first edition of this book as it rarely causes symptoms or problems. It is usually detected during a routine exam and offhandedly mentioned to patients. It rarely causes any vision problems but it does increase the tendency to having corneal abrasions.

Comment by Timothy Root, M.D. — August 26, 2013

Always great from Dr. Root. Meanwhile, still waiting for the video on how to simply use the Binocular Indirect Ophthalmoscope from your own perspective sir. However, if this already exist, can someone pls send me the link? Pls respond Dr. Root as I love all your lectures as they have made me a better student. Pls dont disappoint me sir. Thanks in anticipation. Regards, Ozone.

Comment by Ozone — August 26, 2013

Ozone, I hadn’t planned on making an indirect instruction video for some time. However, I did a quick YouTube search and found a pretty good pair of videos that might explain things:



Comment by Timothy Root, M.D. — August 26, 2013

Congratulation my dear,i think u r agreat teacher and always u do the best ,it is agreat new website and i always waiting for your new books ,u r my first and the greatest teacher in ophthalmology ….resident in ophthalmology from iraq at middle east

Comment by Ali kareem — August 26, 2013

Wonderful. It’s so great. Thanks you so much.
It help me very much in my job everyday .

Comment by PHAN DANG LONG — August 26, 2013

How do you define a Staphyloma? What are the different types and what basic info do you think an Ophthalmic Tech should know about this?

Comment by Kaiti — November 13, 2013

Dear sir
I would like to see the low vision course, pls send to me the course, information, video or anything … Thanks so much.
Best regardes, .

Comment by PHAN DANG LONG — November 15, 2013

A friend of mine has macular schisis. What is this condition?
Thanks in advance.

Comment by Gayle Gordon — December 11, 2013

I am now a qualified Optical Dispenser thanks to this book.

Comment by Sarah-Jane — March 21, 2014

This is really helpful, as I studied my medicine in a different language and has spend a long time looking for the eye dictionary. Thank you very much.

Comment by Yingdi — April 12, 2014

very nice and useful.
easy to study

Comment by malavika — July 13, 2014

I attended the Florida Education Program on 06/2014 & 06/21/14. I loved your lecture. I recieved my book in the mail just a few days ago (The Root Eye Dictionary) due to not having enough at the lecture. Numerous people in my office would like this book as well. We would like to know if you have a discounted price if we buy several or if it is still the regular price for each book. Keep up the amazing job you are doing.

Comment by Audra Schultz — July 14, 2014

I cant thank you enough for what you had done here. I have learned so much from you. can you add DIVERGENCE to the dictionary please. thank you

Comment by louise — September 14, 2014

want about microphthalmous

Comment by padmavathy — February 10, 2015

Excellent book and dictionary. Made my eye rotation so easy. Thanx alot!

Comment by Sam — February 22, 2015

I cheated and looked in my dictionary of eye terminology & found these eye terms that start with “Q”:


Comment by Leslie Bartholomay — February 24, 2015

Thank you

Comment by shokri — May 14, 2015

Thank you so much for helping us, your site makes my days as a coa so much easier. I think you are the best and you should be a millionaire!!!!!

Comment by Cheffern — August 5, 2015

you are intellegent and generous ;it is very hunderstandable book;keep it up.

Comment by tadele girma — June 19, 2016

the book is so good and easily hunderstandable;you are intellegent enough and generouse keep it up.

Comment by tadele girma — June 19, 2016

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