Photoreceptor cell

Migraines, recurrent throbbing headaches that are typically accompanied by nausea and disturbed vision, affect fifteen percent of the world’s population (Migraine). They are particularly sensitive to any form of sound, movement, or light. Light sensitivity, otherwise known as photophobia, is often a side effect of migraines experienced by about eighty percent of migraineurs (Noseda et al 2016). “The inability to endure light can be disabling,” as said by Rami Burstein, academic director of the…

The Seated Boxer is a bronze Hellenistic sculpture created in around 100bc. I attribute this work to the Hellenistic period of Greek art. Sculptors of this period concentrated on depicting male athletes just as what the Seated Boxer is. Emotion in Classical Greek art was merely expressed through simple gesture, a technique that contrasts with the style of Hellenistic sculpture. In Hellenistic art, advancement of skilled led to emotion being portrayed vividly through the detailed work of art.…

distribution of photoreceptors and illumination. For an individual to view an object, they fixate and place the image of the object on the most sensitive part of the retina, fovea centralis to produce detailed vision. As shown in Figure 2, the fovea has a high number of cone receptors which produce high visual acuity and allows the individual to identify colour and light. A high visual acuity is due “to the 1:1 connection of a cone cell to bipolar cell to a single ganglion cell producing a small…

the onlooker's surroundings into the human visual system. The approaching light is consumed by the photoreceptors in the retina and changed over to electrochemical signs, and these signs are transferred to the resulting systems of the visual pipeline. The photoreceptor cells change over light into electrochemical signals, and are separated into two sorts, rods and cones, named for their shape. Rod cells are in charge of our night vision, and react well to diminish light. Poles are discovered for…

simple; nevertheless, each little section of the eyes plays a huge role in perception and become indispensable for accurate vision. For example, in the retina alone, rods and cones play a big role in perception. There are two types of photoreceptors in the human retina, rods and cones. Rods are responsible for vision at low light level and cones activate when light reaches a higher level. Rods do not mediate color vision;…

abnormality, that leaves a person completely unable to see any color. Total color blindness leaves people seeing things only in black, white and gray. Total color blindness comes from a condition called rod monochromacy. Rod Monochromacy is where the rod cells in the retina are present and functional, but all types of cones are either not working properly or missing. Rod monochromacy is very rare, it is thought to only occur in around 0.003% of people or less (National Eye Institute,…

1. a) Define Deuteronopia. b) What causes it? c) Why is it more frequent in males than females? d) Contrast the two types of receptor cells in the retina, and describe the retina’s reaction to light. Deuteranopia is when someone is colorblind, which results from the exposure to green light, causing the person to be confused, mixing up the colors as green, red, and yellow. Color blindness is caused by the green sensitive cones. In addition, deuteranopia is caused by a genetic condition where…

The coat of a white tiger is not pure white. There are many things about white tigers people didn't know about. Such as, white tiger being bred differently. They are bred through inbreeding which means mom to son, father to daughter, or brother to sister generation after generation. A white tiger is born with defects because the same gene that produces the white coat causes the optical nerve to be wired on the wrong side of the brain. So every white tiger is cross eyed even if they look normal.…

When I watched this documentary, The Chernobyl Disaster, through a formal lense, the producer organized this documentary in chronological order. The medium in which this non-live performance was made is a digital narrative and was an 11 minute documentary on YouTube. The colors of this film were cool tone, mostly black and white photos, and a lot of grays and dark blue. These colors, to me, are associated with sadness. For example, dark gloomy days are associated with gray stormy rain clouds.…

projections on cells lining in the inner ear. These projections are called stereocilia, which will bend in response to sound waves and transmit signals to the brain. SANS plays an important role in the retina as well. It aids in formation and maintenance of the specialized retinal cells that detect light and color, photoreceptor cells (USH1G Gene).…