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What is Hemianopia?
Hemianopia which is also sometimes referred to as Hemianopsia , is a visual disorderliness in which one-half of the visual field is affect and the person is able to see only half the things in his visual field of honor and has complete blindness or decreased vision in the other half . Hemianopia is a full term which originated from three dissimilar Greek terms viz . “ hemi ” meaning half , “ an ” which think without and “ opsia ” which translates to vision . So basically it mean without half vision .
Sometimes when a person is suffering from serious migraine , he or she may receive temporary hemianopia but it is ordinarily inadequate lived . While the person hurt from permanent hemianopsia experiences cecity in half his visual field permanently and this is ordinarily due tobrain injuryorbrain neoplasm .
patient suffering from hemianopia tend to run into thing and become easily surprised and charge up due to the sudden growth of things and people in their visual field of battle or so it seems to them . They trip or lessen very easily and are , therefore , quite nervous of crowds and public gatherings .
Types of Hemianopia
Hemianopia can be of various types depending on which side of the visual field is being lost . It is broadly classified into the adopt types-
Homonymous Hemianopia
Homonymous hemianopia is a condition in which the same side of the optical field is turn a loss in both the eyes . It can be left side or the proper side depend on which side of the brain is feign . Our brain ’s connection to the quietus of the organic structure is kind of crisscrossed . So the remaining opthalmic pamphlet on the left side of the brain controls right side of the visual modality in both the eyes . Similarly , right optical pamphlet in the right side of the brain controls left side of the vision of both the heart . So whichever side of the wit gets impress results in the loss of the vision of the opposite sides from both the eyes .
Heteronymous Hemianopia
Heteronymous hemianopsia is a case of hemianopia that can be described as the red of the imaginativeness in dissimilar visual theatre of the eyes . It can be further classify into different types :
When the blindness occurs in the field of visual sense that is closest to the nasal part in both the center , it is term as binasal hemianopia . This occurs due to the comportment of wound or some damage to the sidelong retinal spunk fibers which do not cross in the optic chiasm and convey entropy from the temporal retina . This result in loss of vision from the adenoidal side of both eyes .
Bitemporal hemianopsia is theblindnessor loss of sight from that side of both the eye which is towards the temple or the outer side . This normally occur due to the formation of lesion or harm to the optic decussation area . Optic chiasm is in reality the area near the pituitary gland where the boldness from both the eye crisscross over each other to reach the opposite side of the mentality .
Other Types of Hemianopia
There are some other type of hemianopia as well . Some of them are list below :
This is , as the term indicates , aloss of visionin a quadrant or one quarter of the ocular field . Which quarter of the vision is lose to blindness usually bet on which part of the psyche got damaged . The loss of visual sensation hap in the part which is get in touch to the damage part of the wit .
When the going of vision occurs in the upper part of the visual subject field of both the eyes , it is term as superior hemianopia .
If the expiration of visual sensation is hap in the low one-half of the vision discipline of the eyes , then it is call as substandard hemianopia .
Causes of Hemianopia
As mentioned above , hemianopia may come about due to austere sick headache but that is only impermanent . Other causes of permanent hemianopsia include :
Brain Injury
This may be due to an accident or a brain surgery causing wound or damage to some part of the brain lead in hemianopia . Formation of lesions in unlike part of the mind can also be a cause of hemianopia .
Stroke
Hemianopia can also happen due to astroke . When the brain is not getting enough oxygen , it lay off functioning properly result in a stroke which is a serious and serious aesculapian condition , more often than not resulting into end . But if the patient subsist , he suffers from various disorder , one of them being hemianopsia .
Brain Tumor
psyche tumor can also be a cause of hemianopia . shaping of tumors in brain can result to the brain being damaged or adversely affected resulting into hemianopsia .
Treatment for Hemianopia
Treatment for hemianopia is not so much a treatment as it is a kind of rehabilitation . Different proficiency for treat patients suffering from hemianopsia are available nowadays . All of them are focused on enhancing a person ’s perceptive , and more or less his or her field of imagination . But none of them can heal the disorder .
Doctors can choose to practice any of these techniques for treating hemianopia and sometimes even combine various treatments to achieve best results . Some of them are as follows :
Audio-Visual Stimulation Training
This is a computer programme designed to improve the condition of the hemianopsia patient using sound and light . In this treatment technique , both the moved and untouched field of vision of the mortal suffer from hemianopia is stimulated using multi - centripetal approach . It is especially in effect treatment for homonymous hemianopia .
Explorative Saccade Training
It is also call scan therapy . In this discourse therapy , patients who suffer from hemianopia are trained to make explorative saccades in that part of the visual field where their imaginativeness is lost , without moving their heads . Hemianopia patients are trained to use this proficiency in their mundane lives .
Optical Visual Span Expanders
It is actually some special types of eyeglasses in which a optical prism is mount to increase the visual fields of hemianopia patients . Patient suffering from hemianopia combines the image provided by the optical prism to what he can really see , which increases his visual modality field .
Visual Restoration Therapy
This technique for the intervention of hemianopia is available from NovaVision and uses a reckoner . It go on in half an hour sessions where the patient suffering from hemianopia fixes his regard on a spot and then has to move his head whenever a light stimuli occurs in his athletic field of visual modality . The computer record the data and after some time NovaVision line up the technique according to the data provided by the figurer .
So these were some of the technique that can be used to better rehabilitate the hemianopsia affected role and help them live as normal a life as potential .
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