Abstract
Age-related macular degeneration (AMD) is a multifactorial disease involving the central region of the retina (the macula). The disease is remarkably common, affecting some 30 per cent of the over-70s in the developed world. It is important to appreciate that the macular region extends to an area of approximately 18°-20° (~5.0mm) in diameter as illustrated by the outer dotted circle in Figure 1. The macula is classically subdivided into the fovea (region a), the parafovea (region b) and the perifovea (region c). Note that only the very central 300µm (1.25°) is cone dominated. Overall, macular rods outnumber cones by around 9:1.1,2
Original language | English |
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Pages (from-to) | 16-21 |
Number of pages | 6 |
Journal | Optician |
Publication status | Published - Apr 2015 |