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Plait, Phil (10 June 2010). "Resolving the iPhone resolution". Slate. slate.com . Retrieved 9 October 2021. ...Soneira used the 0.6 arcmin resolution of the eye, but that's for perfect eyesight. Most people don't have perfect eyesight... A better number for a typical person is more like 1 arcmin resolution, not 0.6 The white blood cells in the capillaries in front of the photoreceptors can be perceived as tiny bright moving dots when looking into blue light. This is known as the blue field entoptic phenomenon (or Scheerer's phenomenon). At the center of the macula, there is a small depression called the fovea. The fovea contains only cone photoreceptors and is the point in the retina responsible for maximum visual acuity and color vision. Retina function Sabra, A. I. (Ed.). (1011–1021/1989). The optics of Ibn Al-Haytham: Books I-III: On direct vision (A. I. Sabra, Trans.). The Warburg Institute.

Diagnosis and treatment - Mayo Clinic Retinal diseases - Diagnosis and treatment - Mayo Clinic

If it did that and nothing else, however, there would be a problem. User interface elements like menus and icons would look tiny. To compensate for this, Apple created what it calls HiDPI mode, where each interface element is doubled in size vertically and horizontally and so appears at the same size as it would on a non-Retina display. How does a Retina display compare to non-Retina?Nielsen, Jakob. "Serif vs. Sans-Serif Fonts for HD Screens". Nielsen Norman Group . Retrieved 28 July 2015. In simple terms, Apple ‘converts’ a device’s display to Retina by doubling the number of pixels vertically and horizontal, meaning it has four times as many pixels as its non-Retina counterpart.

Retinal problems: Types, symptoms, and treatments Retinal problems: Types, symptoms, and treatments

A Retina display, then, is not one with the highest resolution available, but may be the optimal balance between image sharpness and the power needed to provide those images. Which Apple products have Retina displays? Recovery time after surgery for a detached retina varies. But as a general guide, for 2 to 6 weeks after surgery: Bartsch, U.; Oriyakhel, W.; Kenna, P. F.; Linke, S.; Richard, G.; Petrowitz, B.; Humphries, P.; Farrar, G. J.; Ader, M. (2008). "Retinal cells integrate into the outer nuclear layer and differentiate into mature photoreceptors after subretinal transplantation into adult mice". Experimental Eye Research. 86 (4): 691–700. doi: 10.1016/j.exer.2008.01.018. PMID 18329018.When the retina sends neural impulses representing an image to the brain, it spatially encodes (compresses) those impulses to fit the limited capacity of the optic nerve. Compression is necessary because there are 100 times more photoreceptor cells than ganglion cells. This is done by " decorrelation", which is carried out by the "centre–surround structures", which are implemented by the bipolar and ganglion cells.