Blind

Condition of lacking visual perception

Blindness
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Synonyms
Pronounce	N/A
Field	Ophthalmology
Symptoms	Complete or nearly complete lack of vision
Complications	Depression, Social isolation
Onset
Duration
Types	Total blindness, Partial blindness
Causes	Genetic disorder, Injury, Disease
Risks
Diagnosis	Visual acuity test, Ophthalmoscopy
Differential diagnosis
Prevention
Treatment	Assistive technology, Rehabilitation
Medication
Prognosis
Frequency
Deaths

Blindness is the condition of lacking visual perception due to physiological or neurological factors. Various scales have been developed to describe the extent of vision loss and define "blindness." Total blindness is the complete lack of form and visual light perception and is clinically recorded as "NLP," an abbreviation for "no light perception." Partial blindness refers to very limited vision.

Causes

Blindness can result from a variety of causes, including:

• Genetic disorders
• Injury
• Diseases such as glaucoma, diabetes, and macular degeneration

Diagnosis

Diagnosis of blindness involves several tests, including:

• Visual acuity test
• Ophthalmoscopy

Treatment

While there is no cure for blindness, various treatments and aids can help individuals manage their condition. These include:

• Assistive technology such as screen readers and Braille
• Rehabilitation programs

Complications

Blindness can lead to several complications, including:

• Depression
• Social isolation

Related Pages

• Visual impairment
• Ophthalmology
• Assistive technology
• Braille
• Rehabilitation (neuropsychology)

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