D-EYE is available for the iPhone 5, 5s, and 6. It easily attaches to the phone via a specially designed, lightweight bumper. D-EYE uses light from the smartphone’s LED, which is off-axis from the phone’s camera aperture, to illuminate the interior of the eye for examination. Due to the unique and proprietary nature of the design of the fundus lens attachment, the company has filed a patent for the D-EYE portable retinal imaging system
To deliver the light exactly coaxial to the camera aperture, the D-EYE fundus lens alters the light path and intensity, using a trade-secret combination of levers, beam splitters and filters. In this way, the light enters the eye directly through the pupil, illuminating the interior and retinal wall. When the operator sees the red reflex from the eye, the D-EYE has been correctly aligned and focused. Re-directing the light path also serves to eliminate corneal glare, caused by light coming from an angle reflecting off of the cornea’s surface, which can make it difficult to view the retina.
D-EYE uses the principle of direct ophthalmology. It’s like looking through a keyhole – the closer you are to the keyhole, the wider the field of view you have beyond it. D-EYE offers a field of view of up 20 degrees. The operator can increase the field of view by moving the D-EYE-equipped phone closer to the eye, without changing the focus. Our suggestion is to go as close as possible to the eye to get the best field of view.
The D-EYE can correct for various refractive errors in the eye by using the smartphone’s auto-focusing capabilities to compensate between-10D myopia to +5D hyperopia. Even with un-dilated pupils, it’s possible to scan the retina with a field of view of 5-8º. The D-EYE provides a view of the optic disc with pupils as small as 2mm, so the D-EYE can offer a rapid screening for glaucoma or hypertensive retinopathy for un-dilated pupils.
If you use a traditional ophthalmoscope every day, then why aren’t you using D-EYE?