 The purpose of this study was to develop a low-cost, portable and easy-to-use method for taking high-resolution fundus photos using a smartphone and a 20D lens. This technique was tested on both children under anesthesia and adults in an ophthalmology clinic, as well as on rabbits in an animal laboratory. The results showed that the technique was successful in capturing high-quality fundus images in both humans and rabbits. Additionally, the technique was found to be effective when combined with a keep lens in the operating room. This article was authored by Louis J. Haddock, David Y. Kim and Shizwa Makai.