Short Wavelength Automated Perimetry

Blue-yellow perimetry is also known as Short Wavelength Automated Perimetry (SWAP). This advancement in technology offers early identification of glaucomatous visual field loss. This procedure differs from the standard automated static perimetry only in that the wavelength of blue light is used as the stimulus and a yellow color of specific brightness is used as the background illumination. The blue-yellow perimetry makes it easier for the practitioner to identify visual field defects, such as establishing a diagnosis of glaucoma and management of ocular hypertensives and neurological disease. The more extensive visual field defects are revealed and are a major asset in the diagnosis and management of these various ocular diseases. The blue-yellow testing condition is no brighter than the standard indoor lighting levels. It only takes approximately three minutes for the patient to adapt to the yellow background.