Imaging

iPhone Low Vision Aid

The Apple iPhone has an app (app = application, or a small program), LookTel Recognizer, available in the iTunes App Store, that allows visually impaired users to recognize items and surroundings. You point the iPhone camera and listen to the phone. The phone recognizes and identifies the object or location. There is no need to hold the camera still or take a photo.

Optical Coherence Tomography (OCT)

Submitted by Vishnu on Tue, 2010-09-07 15:23

Optical Coherence Tomography (OCT) is, perhaps, the most promising technology available to produce images of the eye. During the simple procedure, a laser quickly scans the dilated eye. Unlike other imaging methods, such as ICG and FA, which produce top views of the retina, the image produced is a cross-section of the layers of the retina. Each of the thin layers of photoreceptors, nerve cells, and pigment epithelial cells are clearly delineated.

Indocyanine Green (ICG) Angiography

Submitted by Vishnu on Tue, 2010-09-07 14:59

Indocyanine Green (ICG) Imaging is similar to fluorescein angiography (FA). Like FA, it is a useful tool for the diagnosis and treatment of several forms of macular degeneration and retinopathy. It is more effective than FA in producing images of blood vessel growth and damage in the deeper choroid layer behind the retina. It is also able to produce a better image than FA if blood is present in the macula.

Fluorescein Angiography (FA)

Submitted by Vishnu on Tue, 2010-09-07 14:24

Fluorescein angiography (FA) is a technology that allows photographs of the blood vessels of the retina to be taken. It is a useful tool for the diagnosis and treatment of several forms of macular degeneration and retinopathy as well as other disorders.

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