Here's a testimony of castor oil healing Dry Eye condition. Number of other testimonies on utube about the oil's healing abilities:

Published on Sep 23, 2016

I cured my dry eyes by castor oil. You need to choose the right type of castor oil. I started feeling dry eyes 3 years ago. And I started using castor oil 1 year ago. Last week I came to hospital for a check. And the results were very good. My schirmer test result of 2 eyes: 29mm, 30mm. TBUT (tear break up time) is 8 to 10 seconds. My eyes are almost healed. Remember the castor oil must be:
100% organic
Cold pressed
Hexane free