Blindness
Blindness is the condition of lacking visual perception defined as a profound reduction in visual perception. On the 6m visual acuity scale, blindness is defined as less than 3/60. On the 20ft visual acuity scale, blindness is defined as less than 20/400. On the decimal visual acuity scale, blindness is defined as less than 0.05. Blindness is typically characterized by a visual field of no greater than 10 degrees in radius around central fixation.
What is Blindness?
Blindness is a symptom that people may experience for many reasons. It can be related to infections, chronic conditions, injuries, medication effects, or other health changes. The presence of this symptom alone does not diagnose any condition.
If you have Blindness that is severe, persistent, or accompanied by other warning signs, contact a qualified healthcare provider.
Possible conditions associated with Blindness
The following conditions have been associated with Blindness. Only a health professional can determine the underlying cause.
17q11 microdeletion syndrome
17q11 microdeletion syndrome is a medical condition that may be associated with various symptoms and signs.
Abetalipoproteinemia
Abetalipoproteinemia is a medical condition that may be associated with various symptoms and signs.
Alpha-N-acetylgalactosaminidase deficiency
Alpha-N-acetylgalactosaminidase deficiency is a medical condition that may be associated with various symptoms and signs...
Alstrom syndrome
A multisystemic disorder characterized by cone-rod dystrophy, hearing loss, obesity, insulin resistance and hyperinsulin...
Alström syndrome
Alström syndrome is a medical condition that may be associated with various symptoms and signs.
Amoebiasis due to free-living amoebae
Amoebiasis due to free-living amoebae is a medical condition that may be associated with various symptoms and signs.
Behçet disease
Behçet disease is a medical condition that may be associated with various symptoms and signs.
CACH syndrome
CACH syndrome is a medical condition that may be associated with various symptoms and signs.
CINCA syndrome
CINCA syndrome is a medical condition that may be associated with various symptoms and signs.
Cryptococcosis
Cryptococcosis is a medical condition that may be associated with various symptoms and signs.
Full NF2-related schwannomatosis
Full NF2-related schwannomatosis is a medical condition that may be associated with various symptoms and signs.
GM1 gangliosidosis
GM1 gangliosidosis is a medical condition that may be associated with various symptoms and signs.
Related symptoms
When to seek medical care
Seek urgent care if Blindness is severe, sudden, or occurs with chest pain, difficulty breathing, confusion, severe weakness, or other serious symptoms.