Retinitis pigmentosa

Each one of the following is associated with retinitis pigmentosa, except:ia

		A.A	Usher syndromeia
		B.A	Refsum diseaseia
		C.A	Kearns-Sayre syndromeia
		D.A	Tuberose sclerosisia
		E.A	Abetalipoproteinaemiaia

Ocular manifestations of tuberose sclerosis includes retinal hamartomas

Retinitis pigmentosa

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Retinitis pigmentosa primarily affects the peripheral retina resulting in tunnel vision

Features

• night blindness is often the initial sign
• funnel vision (the preferred term for tunnel vision)

Associated diseases

• Refsum disease: cerebellar ataxia, peripheral neuropathy, deafness, ichthyosis
• Usher syndrome
• abetalipoproteinemia
• Lawrence-Moon-Biedl syndrome
• Kearns-Sayre syndrome
• Alport's syndrome