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Type 2 (referred to as MacTel) is the most common macular telangiectasia. It is categorized as "macular perifoveal telangiectasia", a neurodegenerative metabolic disorder, correlated with diabetes and coronary artery disease. It generally affects both eyes and usually affects both sexes equally.
Telangiectasia macularis eruptiva perstans (TMEP) is persistent, pigmented, asymptomatic eruption of macules usually less than 0.5 cm in diameter with a slightly reddish-brown tinge. [ 1 ] : 616 [ 2 ]
The position of the retina, its vasculature, and the macula. Retina is the innermost layer of the eye. [2] It is made up of three layers, namely the outer pigmented layer, the middle photoreceptor layer and the inner neural layer. The pigmented layer absorbs light that penetrates the inner neural layer.
Parafovea or the parafoveal belt is a region in the retina that circumscribes the fovea and is part of the macula lutea. [1] It is circumscribed by the perifovea . Photograph of the retina of the human eye, with overlay diagrams showing the positions and sizes of the macula, fovea, and optic disc
Macular scarring is formation of the fibrous tissue in place of the normal retinal tissue on the macular area of the retina which provides the sharpest vision in the eyes. It is usually a result of an inflammatory or infectious process. [1] Other etiologies include macular pucker (macular detachment), macular hole, and age-related macular ...
Perifovea is a region in the retina that circumscribes the parafovea and fovea and is a part of the macula lutea. [1] The perifovea is a belt that covers a 10° radius around the fovea and is 1.5 mm wide. [2] [3] The perifovea ends when the Henle's fiber layer disappears and the ganglion cells are one-layered. [4]
The macula (/ˈmakjʊlə/) [1] or macula lutea is an oval-shaped pigmented area in the center of the retina of the human eye and in other animals. The macula in humans has a diameter of around 5.5 mm (0.22 in) and is subdivided into the umbo, foveola, foveal avascular zone, fovea, parafovea, and perifovea areas.
John Donald MacIntyre Gass (2 August 1928, Montague, Prince Edward Island – 26 February 2005, Nashville, Tennessee) was a Canadian-American ophthalmologist, one of the world's leading specialists on diseases of the retina. [1] [2] He was the first to describe many macular diseases. [3]