Retina

Color constancy “refers to the fact that the perceived color of an object is not a simple function of the wavelengths reflected by it” (Pinel, 2014, pg. 149). Color constancy is often misunderstood, however, an easy way to think of color constancy is the distinction that the same object is the same color regardless of the lighting. For example, you know an object is red even though, it appears to be a different color under different lighting environments. It had been said that color constancy is…

뀀뀀l Essay Introduction Visual communication is a marvelous process that requires and uses a complex framework involving our eyes, senses and brain interpretation. An eight-week course scratches the surface of the abundant knowledge there is to be had. This essay will answer some of the behaviors in which vision works and how it affects many areas of our daily lives. 1. Provide an explanation of how our eyes take in visual information and how mind interprets, processes and remembers that data.…

Diabetes is a destructive disease, especially when it is undiagnosed, untreated, or unmanaged. Vision loss and blindness can happen if a diabetic does not take action to keep glucose levels under control. Understanding how diabetes affect the retina is critical for diabetics. The Damage that Diabetes Does After developing diabetes, the body loses its ability to regulate glucose levels in the blood stream. Normally, insulin helps with glucose regulation. With Type 1 diabetes, the pancreas…

These fragile and exposed blood vessels rupture and leak very easily causing retinal scaring which in turn pulls the retina out of position. These scars usually shrink as they heal and dry causing immense pressure at the retinal conjunction eventually enough pressure tears the lining, completely detaching the retina from its lining. “ROP is a multifactorial disease, and may factors have been suggested to cause ROP excluding low birth weight, young gestational age…

(Broadway, 2013). With the growing number of cutting edge technology, clinicians are able to determine the signs and symptoms of glaucoma using optic nerve imaging (Ou, 2014). The tools used are fundus camera, Optical Coherence Tomography, Heidelberg Retina Tomograph and Nerve Fibre Analyser. A fundus camera is usually used to track retinal pathology,…

Assignment 228 . What is the refractive error? Normally, the rays of light entering the eye are brought to a precise focus on the retina, the light sensitive layer lining the back of the eye. When such a focus is not achieved, a refractive error results and vision is not clear. These defects in the focusing power of the eye are called refractive errors, most common symptoms of refractive error is blurry vision. Ophthalmologist can serve the patient by asking questions and obtain information,…

Glaucoma is the leading cause of blindness for people over 60 years old. It is a group of diseases that occur when aqueous humour is unable to flow out of the eye properly, causing an increase in fluid pressure in the eyes, which cause ocular hypertension and damage the optic nerve over time. The flow of aqueous humour can be disrupted either by a partial or full block of its drainage canal or an excess production of the fluid, and the chronic increase in intraocular pressure (IOP) leads to a…

structure of this organ. For example, the lens, cornea, and iris are necessary for the optic capabilities of the eye. Light sensing is performed by photoreceptors located in the retinal pigmented epithelium. Transmission by the eye is performed by the retina and the optic nerve. Lastly, display is specific to the visual cortex (Cvekl and Ashery-Padan 2014). Clearly, a lot of regulation must take place within the expression of genes in order for the eye to develop all of…

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 color, depth, size, and shape of an object. In asking to create a synthetic or artificial color visual system you would first need to create an eyeball that could mend its size to the person’s eye socket. Thus theoretically making an artificial retina in the process of making the eyeball. This would have to take the creation of artificial photoreceptors as well that could connect to neurons in the brain to create the image for the blind person to see. The key component in the blind person…