<prompt> Macula lutea of the retina lies from the optic disc at a distance of:1 mm2 mm3 mm4 mm  <response>: The macula lutea is an area of the retina approximately 5.5 mm in diameter that is rich in cones, situated about 2 disc diameters DD temporal to the optic disc 1 DD 1.5 mm. That is totally 3mm. The central 1.5 mm of the macula is termed the fovea, which has a small central depression approximately 0.35 mm in diameter called the foveola. The vision is most acute at the foveola, where only cones are found; each cone directly relays to a single ganglion cell. Ref: Parsons Diseases of the Eye By Ramanjit Sihota Radhika Tandon, 21st edition, Page 302. 