Cataract

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Cataract

Neuro

Neuro

Bones of the cranium
Anatomy of the cranial base
Anatomy of the cerebral cortex
Introduction to the cranial nerves
Cranial nerve pathways
Anatomy of the olfactory (CN I) and optic (CN II) nerves
Anatomy of the oculomotor (CN III), trochlear (CN IV) and abducens (CN VI) nerves
Anatomy of the trigeminal nerve (CN V)
Anatomy of the facial nerve (CN VII)
Ascending and descending spinal tracts
Cerebral circulation
Nervous system anatomy and physiology
Cranial nerves
Motor cortex
Pyramidal and extrapyramidal tracts
Muscle spindles and golgi tendon organs
Spinal cord reflexes
Sensory receptor function
Somatosensory receptors
Somatosensory pathways
Sympathetic nervous system
Parasympathetic nervous system
Adrenergic receptors
Cholinergic receptors
Cerebellum
Basal ganglia: Direct and indirect pathway of movement
Transient ischemic attack
Ischemic stroke
Intracerebral hemorrhage
Subdural hematoma
Epidural hematoma
Subarachnoid hemorrhage
Arteriovenous malformation
Saccular aneurysm
Broca aphasia
Wernicke aphasia
Concussion and traumatic brain injury
Seizures and epilepsy
Febrile seizure
Cavernous sinus thrombosis
Alzheimer disease
Frontotemporal dementia
Creutzfeldt-Jakob disease
Vascular dementia
Dementia with Lewy bodies
Normal pressure hydrocephalus
Torticollis
Restless legs syndrome
Huntington disease
Essential tremor
Parkinson disease
Multiple sclerosis
Acute disseminated encephalomyelitis
JC virus (Progressive multifocal leukoencephalopathy)
Transverse myelitis
Central pontine myelinolysis
Brain herniation
Seizures: Pathology review
Traumatic brain injury: Pathology review
Dementia: Pathology review
Movement disorders: Pathology review
Demyelinating disorders: Pathology review
Cerebral vascular disease: Pathology review
Anticonvulsants and anxiolytics: Barbiturates
Nonbenzodiazepine anticonvulsants
Anticonvulsants and anxiolytics: Benzodiazepines
Anti-parkinson medications
Anatomy of the eye
Anatomy and physiology of the eye
Photoreception
Optic pathways and visual fields
Anatomy and physiology of the ear
Vestibular transduction
Auditory transduction and pathways
Vestibulo-ocular reflex and nystagmus
Cortical blindness
Bitemporal hemianopsia
Cataract
Glaucoma
Retinal detachment
Age-related macular degeneration
Diabetic retinopathy
Corneal ulcer
Uveitis
Keratitis
Conjunctivitis
Hemianopsia
Homonymous hemianopsia
Conductive hearing loss
Tympanic membrane perforation
Otitis externa
Otitis media
Eustachian tube dysfunction
Vertigo
Meniere disease
Labyrinthitis
Acoustic neuroma (schwannoma)
Eye conditions: Refractive errors, lens disorders and glaucoma: Pathology review
Eye conditions: Retinal disorders: Pathology review
Eye conditions: Inflammation, infections and trauma: Pathology review
Vertigo: Pathology review

Key Takeaways

A cataract is a condition in which the eye becomes cloudy and opacified, affecting ones s vision. Cataracts can be congenital, meaning people are born with them. Congenital cataracts usually result from congenital infections or some genetic or metabolic conditions. Cataracts can also be acquired, usually in individuals with advanced age. Acquired cataracts develop slowly and can occur in one or both eyes. Over time, they become more dense and yellowed and can eventually cause blindness. Common risk factors for acquired cataracts include old age, excessive alcohol consumption, smoking, eye infection, or trauma. Risk is also increased in people with Diabetes Mellitus or in people whose eyes are exposed to radiation such as ultraviolet.