nounretinas, retinae

• A layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

  ‘And for vision it is also necessary that there should be visual purple behind the retina and an opaque cornea and iris.’

  More example sentences

  • ‘As with similar work in the United States, the prosthetic retina works by passing artificially stimulating the optic nerve, in line with signals from a tiny digital camera mounted on a pair of glasses.’
  • ‘The chip captures light that enters the eye, and generates an electrical signal that is transmitted to the overlaying neural cells of the retina.’
  • ‘Seeing an object requires the mediation of light to create an image in the retina.’
  • ‘The luminous light shone into his retinas and he squinted slightly.’
  • ‘He tried to imagine a world with colours and brightness but all he could think of was the feeling he got when he stared directly at a light for too long and it burned a red and blue image on his retina when he closed his eyes.’
  • ‘The protein of the lens had changed, making it opaque and preventing light from reaching the retina.’
  • ‘The lens works much like a camera, focusing light onto the retina at the back of the eye.’
  • ‘I watched until my eyes hurt, and when I turned away, a black imprint was left on my retina by light too strong to bear.’
  • ‘His dissection of the eye yielded the distinction between cornea, retina, iris, and chorioid coat.’
  • ‘The flatter cornea then focuses images farther back inside the eyeball, projecting them on the retina instead of in front of it, as is the case in nearsightedness.’
  • ‘Lutein is one of the hydroxy carotenoids that make up the macular pigment of human retinas.’
  • ‘Light rays bounce off the person and onto the retina through the pupil, so if the pupils are large, more light will enter the eyes, and therefore providing a better image.’
  • ‘However, in 1996, scientists at the University of Illinois in Chicago found that astaxanthin protected the retinas of rats exposed to damaging light.’
  • ‘As soon as the flash frames started strobing audience retinas, the soundtrack began adding layers of chaotic on-the-scene sound recordings.’
  • ‘Many people with total blindness experience life-long sleeping problems because their retinas are unable to detect light.’
  • ‘However, many deep-sea species have extremely thick retinae with large numbers of visual pigments.’
  • ‘Greens and reds are bright enough to sting your retinas, but blues and yellows are soft and washed out.’
  • ‘More than 10 million Americans are thought to have macular degeneration and retinitis pigmentosa, diseases of the retina that often result in blindness.’
  • ‘In Steven Spielberg's film, Minority Report, every time Tom Cruise walked down a street, advertising billboards scanned his retinas and broadcast personalised ads.’