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In eyes where the vitreous has fully or partially detached from the retina, this is the space created between the posterior cortical vitreous face and the internal limiting membrane of the retina. Screen Technology: Liquid Retina Display screens are made using the older LCD technology rather than the newer OLED used in Super Retina XDR and HD displays. Now, almost every device with a screen that Apple produces is equipped with Retina display. As Apple continues to create new devices, new marketing terms for Retina display have been introduced. Jobs, Steve. "Apple iPhone 4 announcement". YouTube. Apple. Archived from the original on 2021-12-15 . Retrieved 28 July 2015. Novakovic, Nebojsa. "IBM T221 - the world's finest monitor?". The Inquirer. Archived from the original on September 14, 2009 . Retrieved 30 August 2015. {{ cite web}}: CS1 maint: unfit URL ( link)
Retinal diseases - Symptoms and causes - Mayo Clinic
Writer John Gruber suggested that the arrival of Retina displays on computers would trigger a need to redesign interfaces and designs for the new displays: Change your computer display and add audio systems. Adjust the font size and monitor contrast in your computer's settings. Consider adding speech-output systems or other technologies to your computer. If you have a retinal tear, you must seek prompt treatment to prevent retinal detachment and vision loss. Common symptoms of a torn retina include a sudden appearance of floaters or flashes of light.Additional structures, not directly associated with vision, are found as outgrowths of the retina in some vertebrate groups. In birds, the pecten is a vascular structure of complex shape that projects from the retina into the vitreous humour; it supplies oxygen and nutrients to the eye, and may also aid in vision. Reptiles have a similar, but much simpler, structure. [22]
Retina: what is it, symptoms and treatment | Top Doctors
Retinal detachment is a medical emergency that, without treatment, may lead to permanent vision loss. Retinopathy
Treatment
So you see that it’s all a bit vague – but the rough idea is that a screen is rated as Retina if it is sharp enough for the human eye not to be able to see individual pixels at a typical usage distance. Icon sizes The vertebrate retina has 10 distinct layers. [15] From closest to farthest from the vitreous body: The Retina display debuted in 2010 with the iPhone 4 and the iPod Touch (4th Generation), and later the iPad (3rd generation) where each screen pixel of the iPhone 3GS, iPod touch (3rd generation), and the iPad 2 was replaced by four smaller pixels, and the user interface scaled up to fill in the extra pixels. Apple calls this mode HiDPI mode. In simpler words, it is one logical pixel corresponds to four physical pixels. The scale factor is tripled for devices with even higher pixel densities, such as the iPhone 6 Plus and iPhone X. [4] The advantage of this equation is that the CPU "sees" a small portion of the data and calculates the relative positions of each element, and the GPU renders these elements with high quality assets. The goal of Retina displays is to make the text and images being displayed more crisp. [5] [6] [7] [8]
Retina display - Wikipedia Retina display - Wikipedia
The first smartphone following the iPhone 4 to ship with a display of a comparable pixel density was the Nokia E6, running Symbian Anna, with a resolution of 640 × 480 at a screen size of 62.5mm. This was an isolated case for the platform however, as all other Symbian-based devices had larger displays with lower resolutions. Some older Symbian smartphones, including the Nokia N80 and N90, featured a 2.1 inch display at 259 ppi, which was one of the sharpest at the time. The first Android smartphones with the same display - Meizu M9 was launched a few months later in beginning of 2011. In October of the same year Galaxy Nexus was announced, which had a display with a better resolution. By 2013 the 300+ppimark was found on midrange phones such as the Moto G. [36] From 2013 to 2014, many flagship devices such as the Samsung Galaxy S4 and HTC One (M8) had 1080p (FHD) screens around 5-inches for a 400+ PPI which surpassed the Retina density on the iPhone 5. The second major redesign of the iPhone, the iPhone 6, has a 1334 × 750 resolution on a 4.7-inch screen, while rivals such as the Samsung Galaxy S6 have a QHD display of 2560 × 1440 resolution, close to four times the number of pixels found in the iPhone 6, giving the S6 a 577 PPI that is almost twice that of the iPhone 6's 326 PPI. [37] The Sony Xperia Z5 Premium launched in late 2015 had 806 PPI.As an example, the following matrix is at the heart of a computer algorithm that implements edge detection. This matrix is the computer equivalent to the centre–surround structure. In this example, each box (element) within this matrix would be connected to one photoreceptor. The photoreceptor in the centre is the current receptor being processed. The centre photoreceptor is multiplied by the +1 weight factor. The surrounding photoreceptors are the "nearest neighbors" to the centre and are multiplied by the −1/8 value. The sum of all nine of these elements is finally calculated. This summation is repeated for every photoreceptor in the image by shifting left to the end of a row and then down to the next line. Cone-rod dystrophy (CORD) describes a number of diseases where vision loss is caused by deterioration of the cones and/or rods in the retina.