Visual acuity

warning signs and develops slowly. It is only when the condition is quite advanced when patient becomes aware of the visual impairments. There is also no noticeable sight loss for many years because the vision loss happens first in your peripheral vision or side vision. A patient with glaucoma can still have 20/20 vision regardless on the optic nerve damage. In glaucoma, visual acuity or sharpness of vision is maintained until late stage. Indeed, early diagnosis nearly impossible without a…

Characteristics of Vision in Children with CVI The visual system is a powerful and complex tool for understanding and perceiving the world. It has many aspects and dimensions that change throughout an individual’s lifetime. Therefore, it is unsurprising that there are many stages of vision at which perception can become impaired. Cortical (or cerebral) visual impairment (CVI) refers to any impairment or loss of vision brought about by damage to the brain or the central nervous system, rather…

assume they would fail. And then there is the healthcare field. This is an area of struggle for the visually impaired because I think that most people don’t take the time to think of the minor or major accommodations needed for people with poor visual acuity. Most visually impaired patients voiced their opinion about how hard it was to read signs within the facility or even read the names on their medication bottles. The sad part is that most of these clients are too embarrassed to speak up when…

organism matures. Because a large majority of the neurons in the superior colliculus are visually responsive, Wallace et al.1 hypothesized that visual stimuli was necessary for the development of multisensory integration. To test this claim, he and his colleagues reared 9 cats in complete darkness and tested each neuron in the superior colliculus for responses to visual, auditory and somatosensory stimuli. It was found that, although sensory experience is not necessary for the superior colliculi…

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…

their mother. Unlike adults, infants imitate actions more than is necessary, even when it is not clear that the action is desirable. Basic Visual Function and Visual Attention…

1. Retinal Detachment Retinal detachment is a medical emergency that occurs when the thin sensory layer of the eye becomes separated from the rest of the eye. This cause vision changes and blindness if not taken care of properly. Proper nursing care and patient compliance is essential in restoring functioning of the eye and protecting against serious complications. ( Williams, 2011)(WebMD, 2016). Anatomy and Physiology The retina in a thin layer of tissue that is covered in nerve cells at the…

history relevant for abdominal migraines and a 9 millimeter in diameter complex pineal cystic gland, incidentally found at age 5 and being followed by Neurosurgery with no interval changes over the past year. On initial exam his best-corrected visual acuity (BCVa) was 20/30 in both eyes (OU) with no afferent pupillary defect. Color vision, stereopsis, motility and ocular balance…

What have studies of visual object agnosia and prosopagnosia contributed to our understanding of visual recognition? A lot of what we understand about visual recognition comes from investigating cases where the processes involved go wrong. The absence of a cognitive ability can provide is with the ability to look at where things differ in these individuals from those with normal levels of processing. In the case of visual recognition, we can look at different forms of visual agnosias in order…

lupus. The purpose of this paper is to draw attention to the side effects that can damage the visual system. Even though the side effects cover a broad range, the results on the illness that Plaquenil is prescribed for outweigh the side effects. The side effects will impact individuals in different ways, depending on the dosage and the length of time that the medicine is prescribed. Effects on the visual system include reactions on the cornea, the retina, and the macula. Effects could also…