The name refers to the inability to see things below and around you, which comes as a result of gradually damaged side sight. Affected side vision: RP causes so-called tunnel vision.Driving at dusk and night can also be a problem. It may be difficult for you to adjust to the dim environment, such as movie theaters and other rooms with low light. Reduced night vision: As the disease progresses, you may not be able to see at night, even though your daytime vision remains fine.Therefore, males usually experience more severe consequences of RP than females. In females, with two X chromosomes, the mutation must occur in both copies of the gene to produce a disorder. Males have only one X chromosome, which means that one altered copy of the gene in each cell can cause the condition. X-linked pattern: X-linked pattern is associated with the X chromosome, one of the two sex chromosomes.Autosomal recessive pattern: If each parent of an individual carries one copy of the recessive mutated gene, that means that the signs of RP may never show, even though the individual carries the same gene.Most people who have this type of RP have an affected parent and other family members who have the same problem. Autosomal dominant inheritance pattern: This means that one copy of an altered gene in each cell can be sufficient to cause the disorder.Three possible inheritance patterns can be described as retinitis pigmentosa causes: Daytime vision usually becomes reduced over time. Since the rods typically break down before cones, it’s common that people with RP primarily face vision difficulties while in a dark environment. Cones – responsible for providing vision in bright light, including even color vision.Īccordingly, the mutations of those genes may lead to gradual vision loss, night blindness, and oversensitivity to bright light (photophobia).Rods – responsible for providing vision in low light.Namely, the retina consists of two types of photoreceptors, which are: The genes associated with retinitis pigmentosa are essential for the structure and function of photoreceptors – specialized light receptor cells – found in the retina. ![]() Unlike most eye problems, which are caused by an injury or some other diseases, retinitis pigmentosa is an inherited disorder.
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