Smartphones become "eye-phones" with low-cost devices developed by
  ophthalmologists 
From: Stanford School of Medicine - 03/07/2014
By: Rosanne Spector

Researchers at the Stanford University School of Medicine have developed two
inexpensive adapters that enable a smartphone to capture high-quality images
of the front and back of the eye. The adapters make it easy for anyone with
minimal training to take a picture of the eye and share it securely with
other health practitioners or store it in the patient’s electronic record.

Read the entire article at:
http://med.stanford.edu/ism/2014/march/eyego.html

Links:
Robert Chang
https://med.stanford.edu/profiles/robert-chang

Stanford Biodesign Program
http://biodesign.stanford.edu/bdn/index.jsp

EyeGo adapters let you perform eye exams with a smartphone
http://www.gizmag.com/eyego-smartphone-eye-exam/31166/