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Visual field loss on the left or right side of the vertical midline
Hemianopsia, or hemianopia, is a visual field loss on the left or right side of the vertical midline. It can affect one eye but usually affects both eyes
Homonymous_hemianopsia
Loss of vision in the outer half of both the right and left visual field
Bitemporal hemianopsia is the medical description of a type of partial blindness where vision is missing in the outer half of both the right and left
Bitemporal_hemianopsia
Loss of vision in half the visual field
Hemianopsia, or hemianopia, is a loss of vision or blindness (anopsia) in half the visual field, usually on one side of the vertical midline. The most
Hemianopsia
Loss of vision in the inner half of both the right and left visual field
Binasal hemianopsia is the medical description of a type of partial blindness where vision is missing in the inner half of both the right and left visual
Binasal_hemianopsia
Altered region in an otherwise normal field of vision
scotomata extend out to the periphery to cause the characteristic bitemporal hemianopsia. This type of visual-field defect tends to be obvious to the person experiencing
Scotoma
Loss of vision in a quarter of the visual field
Wayback Machine Visual Fields in Brain Injury - Hemianopsia.net Everything you need to know about Hemianopsia Wood JM, McGwin G, Elgin J, Vaphiades MS, Braswell
Quadrantanopia
Tool to detect defects in central vision
PMID 26783097. "Visual Field Loss - Hemianopsia.net Everything you need to know about Hemianopsia". www.hemianopsia.net. "Amsler grid". Smart Optometry
Amsler_grid
Suicide method
temporal bone directed bullets, temporal lobe abscess, meningitis, aphasia, hemianopsia, and hemiplegia are common late intracranial complications. As many as
Suicide_by_firearm
Area in visual space that can be seen when the eye fixates a point
bitemporal hemianopsia Paris as seen with binasal hemianopsia Paris as seen with left homonymous hemianopsia Paris as seen with right homonymous hemianopsia Tubular
Visual_field
Artery which supplies blood to the occipital lobe of the brain
involved Homonymous hemianopsia (often upper quadrantic): Calcarine cortex or optic radiation nearby. Bilateral homonymous hemianopsia, cortical blindness
Posterior_cerebral_artery
Brain tumor of pituitary gland embryonic tissue
present with bitemporal inferior quadrantanopia leading to bitemporal hemianopsia, as the tumor may compress the optic chiasm. It has a point prevalence
Craniopharyngioma
objects in their periphery where they cannot see. Hemianopsia Binasal hemianopsia Bitemporal hemianopsia Whishaw, I. Q., & Kolb, B. (2015). Fundamentals
Macular_sparing
Blood vessel
aneurysm and can cause visual field defects such as bitemporal heteronymous hemianopsia (due to compression of the optic chiasm), psychopathology and frontal
Anterior_communicating_artery
Defect in one's visual field
include: [citation needed] Hemianopsia Homonymous hemianopsia Heteronymous hemianopsia Binasal hemianopsia Bitemporal hemianopsia Superior hemianopia Inferior
Anopsia
Asymmetrically-impaired spatial awareness due to a brain hemisphere being damaged
function, but not vice versa. Neglect is not to be confused with hemianopsia. Hemianopsia arises from damage to the primary visual pathways cutting off the
Hemispatial_neglect
Difference in coloration, usually of the iris but also of hair or skin
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Heterochromia
Saddle-shaped depression in the sphenoid bone of the skull
pituitary stalk. Compression of the optic chiasm can lead to bitemporal hemianopsia, and, when there is no relevant trauma, this clinical finding is pathognomonic
Sella_turcica
Part of the brain at the back of the head
pattern. If one occipital lobe is damaged, the result can be homonymous hemianopsia vision loss from similarly positioned "field cuts" in each eye. Occipital
Occipital_lobe
Neural pathway in the visual system
of the brain are affected, the result is a contralateral homonymous hemianopsia. The upper division: Projects to the upper bank of the calcarine fissure
Optic_radiation
Body parts responsible for vision
bottom: 1. Complete loss of vision, right eye 2. Bitemporal hemianopia 3. Homonymous hemianopsia 4. Quadrantanopia 5&6. Quadrantanopia with macular sparing
Visual_system
Surgical removal of one hemisphere of the brain
individuals may be at risk. A visual deficit called contralateral homonymous hemianopsia is expected to occur in most patients, where the entire visual field
Hemispherectomy
Paired artery that supplies blood to the cerebrum
lesion, especially during the acute period. Contralateral homonymous hemianopsia is often present. Wikimedia Commons has media related to Arteria cerebri
Middle_cerebral_artery
Failure of the brain to process input from one eye
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Amblyopia
Eyes not aligning when looking at something
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Strabismus
Minor form of stroke
spatial orientation or dizziness Visual field deficits, such as homonymous hemianopsia or monocular blindness Sensory deficits in one or more limbs and of the
Transient_ischemic_attack
Cranial nerve connecting the eye to the brain
causes loss of vision laterally in both visual fields or bitemporal hemianopsia (see image to the right). Such damage may occur with large pituitary
Optic_nerve
Swelling of the eyelid due to infection of an oil gland
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Stye
Medical condition
Presentation Seizures 75–90% Vascular headache 40–60% Developmental (cognitive) delay 50–70% Glaucoma 30–70% Hemianopsia 40–45% Hemiparesis 25–60%
Sturge–Weber_syndrome
Oval-shaped pigmented area near the center of the retina
sparing. (For example, visual field testing might demonstrate homonymous hemianopsia with macular sparing.) In the case of occipitoparietal ischemia owing
Macula
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Primary_congenital_glaucoma
Inflammation of the eye
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Conjunctivitis
Inflammation of the eyelid
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Blepharitis
Vision loss due to damage to the macula of the eye
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Macular_degeneration
Worsening ability of the eyes to focus with age
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Presbyopia
Group of eye diseases related to poor retinal and nerve perfusion
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Glaucoma
Drooping of the upper eyelid over the eye
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Ptosis_(eyelid)
Nerves that emerge directly from the brain
right sides (homonymous hemianopsia), or may have difficulty seeing objects from their outer visual fields (bitemporal hemianopsia) if the optic chiasm is
Cranial_nerves
Inflammatory swelling of the eyelid due to meibomian gland blockage
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Chalazion
Neural pathway within the human visual system
midline, also known as homonymous hemianopsia. A lesion in the left optic tract will cause right-sided homonymous hemianopsia, while a lesion in the right
Optic_tract
Neurodegenerative disease caused by prions
variant CJD (6 to 12 months life expectancy) Visual/Heidenhain variant: Hemianopsia, anopsia, scotoma, palinopsia, hallucinations, cortical blindness, very
Creutzfeldt–Jakob_disease
Feature in embryogenesis
symptoms, but, if large enough, it may cause vision loss, bitemporal hemianopsia, blurry vision, and dulled color vision. Rathke's pouch is a sac-like
Rathke's_pouch
Visual aura associated with migraine
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Scintillating_scotoma
Decreased ability to see color or color differences
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Color_blindness
Tool used by eye care professionals
peripheral sensitivity Hemianopsia Quadrantanopia Scotoma Visual field Homonymous hemianopsia Binasal hemianopsia Bitemporal hemianopsia Visual field test
Humphrey visual field analyser
Humphrey_visual_field_analyser
Inability to focus on distant objects
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Myopia
Bleeding within parenchymal tissue of the brain
contralateral sensory loss, contralateral conjugate gaze paresis, homonymous hemianopsia, aphasia, neglect, or apraxia Thalamus - Contralateral sensory loss,
Intraparenchymal_hemorrhage
Type of visual impairment
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Riddoch_syndrome
Visual maladies
whole optic tract is homonymous hemianopsia. A lesion in the left optic tract will cause right-sided homonymous hemianopsia, while a lesion in the right
Visual_pathway_lesions
Double vision
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Diplopia
Swelling of the conjunctiva
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Chemosis
Rare brain condition, leading to severe swelling
with PRES may experience coma. The visual changes in PRES may include hemianopsia (inability to see the left or right part of the visual field), blurred
Posterior reversible encephalopathy syndrome
Posterior_reversible_encephalopathy_syndrome
Excessive dilation of the pupil
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Mydriasis
Infectious disease that causes a roughening of the inner surface of the eyelids
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Trachoma
Abnormal intolerance to visual perception of light
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Photophobia
Medical condition
rapid growth of the tumor, leading to visual symptoms (e.g. bitemporal hemianopsia) and hyperpigmentation. The severity of the disease is dependent upon
Nelson's_syndrome
Potentially deadly side effect of very high pressure within the skull
contralateral visual field deficits in both eyes (contralateral homonymous hemianopsia). Another important finding is a false localizing sign, the so-called
Brain_herniation
Inflammation of the optic nerve
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Optic_neuritis
Condition making it difficult or impossible to see in relatively low light
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Nyctalopia
Deposits within the eye's vitreous humour
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Floater
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Intraocular_hemorrhage
Medical condition
hemiparesis or hemiplegia, right-sided sensory loss, and right homonymous hemianopsia may manifest as well. Persons with global aphasia may recognize location
Global_aphasia
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Neonatal_conjunctivitis
Eye condition caused by ultraviolet radiation
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Photokeratitis
Aberration of vision due to asymmetry in the eye's lens or cornea
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Astigmatism
Tumor of the pituitary gland
visual field defects, classically on the left and right in bitemporal hemianopsia. It arises from the compression of the optic nerve by the tumor. The
Pituitary_adenoma
Medical condition of dry eyes
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Dry_eye_syndrome
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Corneal_opacity
Medical condition from optic nerve damage
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Non-arteritic anterior ischemic optic neuropathy
Non-arteritic_anterior_ischemic_optic_neuropathy
Term for pathological conditions effecting the macula
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Maculopathy
Cognitive disorder of face perception
associated with other disorders associated with nearby brain areas: left hemianopsia (loss of vision from left side of space, associated with damage to the
Prosopagnosia
Decreased ability to see
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Visual_impairment
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Argyll_Robertson_pupil
Inflammation of the uvea of the eye
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Uveitis
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Achromatopsia
Eye disease affecting the retina
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Acute idiopathic blind spot enlargement syndrome
Acute_idiopathic_blind_spot_enlargement_syndrome
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Corneal_neovascularization
Absence of the iris, usually involving both eyes
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Aniridia
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Oculomotor_nerve_palsy
Excessive constriction of the pupil
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Miosis
Type of color vision
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Dichromacy
Eye disorder found in prematurely-born babies
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Retinopathy_of_prematurity
Impairments in nervous system function affecting a specific region of the body
loss of vision on one side of the visual field of both eyes (homonymous hemianopsia) visual agnosias, i.e. inability to recognize familiar objects, colors
Focal_neurologic_signs
Most common genetic condition leading to color blindness
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Congenital red–green color blindness
Congenital_red–green_color_blindness
Abnormal white reflection from the eye's retina
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Leukocoria
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Irvine–Gass_syndrome
Clouding of the lens inside the eye, causing poor vision
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Cataract
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Internuclear_ophthalmoplegia
Congenital anomaly in which the eye openings are small
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Blepharophimosis
When one eye's exposure to light creates a muted pupil response in both eyes
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Relative afferent pupillary defect
Relative_afferent_pupillary_defect
Loss of visual acuity associated with illness or aging
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Acute_visual_loss
Visual disorder where eyes work independently
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Exotropia
Small deviations of eye alignment in binocular vision
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Monofixation_syndrome
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Episcleritis
Gradual retinal degeneration leading to progressive sight loss
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Retinitis_pigmentosa
Progressive eye disease
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Fuchs'_dystrophy
Eye infection caused by a protist
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Acanthamoeba_keratitis
Blockage of the tear ducts
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Nasolacrimal_duct_obstruction
Inflammation of the cornea of the eye
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Keratitis
Medical condition
Nyctalopia Oguchi disease Blindness / Vision loss / Visual impairment Anopsia Hemianopsia binasal bitemporal homonymous Quadrantanopia subjective Asthenopia Hemeralopia
Endophthalmitis
diopter, dioptre, dioptrics, diplopia, eisoptrophobia, emmetropia, hemianopsia, myopia, opsoclonus, optic, optokinetic, panopticon, pleoptics, synopsis
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