Hemianopsia

Hemianopsia: Description, Causes and Risk Factors:Hemianopsia is a term that describes a loss of vision that affects half of the visual field of one eye or both eyes.HemianopsiaConditions or injuries that affect the optic nerve can cause hemianopsia. The sequelae (aftereffects) of stroke, brain aneurysm, occlusion of the optic artery, brain tumors, or traumatic head injuries can all result in hemianopsia. Occasionally, individuals who suffer from migraine headaches may experience this during a migrainous episode or as part of the prodromal aura that precedes the actual headache; this type of hemianopsia resolves completely upon resolution of the headache. Transient hemianopsia can result from bouts of extremely high blood pressure or during or after a seizure. Other rare causes of hemianopsia include infections, such as encephalitis, brain abscess, progressive multifocal leukoencephalopathy, and Creutzfeldt-Jakob disease.The most common defect, right homonymous hemianopsia, occurs in corresponding halves of the right field of vision. It can also occur in corresponding halves of the left field of vision, in the upper half of the field (superior hemianopsia), the lower half (inferior hemianopsia), or both outer halves of the field. In this, half of the field is blanked out on both eyes.Recovery of vision after stroke or head injury is usually maximal within the first three to six months; this persisting after that point is usually permanent.Symptoms:Symptoms of this involve the inability to see objects in half of the visual field of one or both eyes, which may be manifested by reading difficulties, problems walking through crowded areas, frequent accidents (bumping into objects that are located in the lost visual field), or being startled at what seems to be the sudden emergence of people or objects in the visual field.Diagnosis:Diagnosis is usually evident when basic testing reveals a blind area in half of the visual field of one or both eyes. Further testing will be necessary to uncover the underlying causative condition: CT or MRI scanning may reveal the presence of a stroke, aneurysm, or brain tumor.Treatment:Treatment team involve: Neurologists, ophthalmologists, and neuroophthalmologists all work with patients with this. Occupational therapists and vision rehabilitation specialists can be integral in teaching the individual how to compensate for their vision loss.Treatment includes therapy to practice techniques that may help an individual overcome the obstacles of this. For example, changing reading techniques (looking at the last part of the word, rather than the first) may improve an individual's ability to read and enjoy reading. Special scanning techniques may be taught, using a machine called a Dynavision, which will help an individual learn how to turn the head in certain ways to scan the environment and compensate for the lost visual field.Special glasses lenses, some with mirrors or prisms incorporated, may allow an individual with hemianopsia to view a greater visual field.NOTE: The above information is educational purpose. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition.DISCLAIMER: This information should not substitute for seeking responsible, professional medical care.

0 Comments

Submit a Comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Cart Preview

5 Fitness Tips for Soccer Players

5 Fitness Tips for Soccer Players

Soccer is one of the most watched and followed sport around the world. Soccer is obviously has given the world many known figures like Pele, Ronaldo, Messi, Zidane, Maradona, Neymar and many more. There are many people who dream to be one of them and indulge their...

Early Risers Have Lower Risk to Develop Breast Cancer

Early Risers Have Lower Risk to Develop Breast Cancer

Recent British research, presented at the National Cancer Research Institute annual conference in the UK, suggests that women who are early risers have lower chances to develop breast cancer. To study the link between sleep habits and breast cancer, researchers...

[WpProQuiz 1]

Featured Products

The 5 Best Accessories for Sports Fans

It is very entertaining to be a sport fan. There is a big variety of sport games that are extremely interesting to follow. Moreover, it is always fun to anticipate the score and watch the enthusiasm live. One of the benefits of being sports fan is using different...

read more

Exercise May Serve as an Antidepressant

A new study of nearly 18,000 participants found that those with high fitness at middle age were significantly less likely to die from heart disease in later life, even if they were diagnosed with depression. Doctor's Tips: How to Stay Fit While Treating Depression Dr....

read more

MediGoo is attending the largest health/medical industry event in Düsseford, Germany. We welcome you to visit our stand at hall 15 booth E55. Welcome, hope to see you there 15E55.