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X-linked congenital stationary night blindness

X-linked congenital stationary night blindness is a disorder of the retina, which is a specialized tissue at the back of the eye that detects light and colour. People with this condition typically have difficulty seeing in low light (night blindness). They also have other vision problems, including increased sensitivity to light (photophobia), loss of sharpness (reduced visual acuity), severe nearsightedness (high myopia), involuntary movements of the eyes (nystagmus), and eyes that do not look in the same direction (strabismus). Colour vision is typically not affected in people with X-linked congenital stationary night blindness.

Descripción

X-linked congenital stationary night blindness is a disorder of the retina, which is a specialized tissue at the back of the eye that detects light and colour. People with this condition typically have difficulty seeing in low light (night blindness). They also have other vision problems, including increased sensitivity to light (photophobia), loss of sharpness (reduced visual acuity), severe nearsightedness (high myopia), involuntary movements of the eyes (nystagmus), and eyes that do not look in the same direction (strabismus). Colour vision is typically not affected in people with X-linked congenital stationary night blindness.

The vision problems associated with X-linked congenital stationary night blindness are congenital, which means they are present from birth. The vision problems also tend to remain stable (stationary) over time.

Researchers have identified two major types of X-linked congenital stationary night blindness: the complete form and the incomplete form. The types have very similar signs and symptoms. However, everyone with the complete form has night blindness, while not all people with the incomplete form have night blindness. The types are distinguished by their genetic causes and by the results of a test called an electroretinogram, which measures the function of the retina.

Patrones de herencia

The source lists the following possible inheritance patterns: X-linked recessive. More than one pattern can apply in different cases.

Otros nombres

X-linked CSNB

XLCSNB

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Historial del artículo

La información en esta página está escrita y revisada por pares por clínicos calificados.
  • 10 Mar 2025 | Última versión
  • 1 Jun 2024 | Publicado originalmente

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