Macular Pigment Densitometer - Brown University, Rhode Island

Tests Performed on the Macular Pigment Densitometer

Macular Pigment Density (MacPig) Test

The MacPig Test uses open heterochromatic flicker photometry to measure macular pigment density in the central 4 degrees of the macula. Lower levels of macular pigment have been demonstrated in patients with macular degeneration, and is under investigation as a risk factor for development of the disease. Studies on primary relatives of macular degeneration patients suggest that these individuals have an increased risk of having lower levels of macular pigment as well.

Lower levels of macular pigment have been demonstrated in patients with macular degeneration, and is under investigation as a risk factor for development of the disease. Studies on primary relatives of macular degeneration patients suggest that these individuals have an increased risk of having lower levels of macular pigment as well.

Xanthophyllic macular pigment envelopes the delicate foveal cones and is believed to provide significant protection against free-radical damage produced by light at the blue end of the spectrum. Early recognition of this condition may allow the patient to change diet or add lutein/zeaxanthine supplements to increase pigment density.