From HPO
Macular degeneration- MedGen UID:
- 7434
- •Concept ID:
- C0024437
- •
- Disease or Syndrome
A nonspecific term denoting degeneration of the retinal pigment epithelium and/or retinal photoreceptor cells of the macula lutea.
Night blindness- MedGen UID:
- 10349
- •Concept ID:
- C0028077
- •
- Disease or Syndrome
Inability to see well at night or in poor light.
Nystagmus- MedGen UID:
- 45166
- •Concept ID:
- C0028738
- •
- Disease or Syndrome
Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms.
Peripheral visual field loss- MedGen UID:
- 116124
- •Concept ID:
- C0241688
- •
- Finding
Loss of peripheral vision with retention of central vision, resulting in a constricted circular tunnel-like field of vision.
Optic disc pallor- MedGen UID:
- 108218
- •Concept ID:
- C0554970
- •
- Finding
A pale yellow discoloration of the optic disc (the area of the optic nerve head in the retina). The optic disc normally has a pinkish hue with a central yellowish depression.
Severely reduced visual acuity- MedGen UID:
- 226987
- •Concept ID:
- C1301509
- •
- Disease or Syndrome
Severe reduction of the ability to see. On the 6m visual acuity scale, severe reduction is defined as less than 6/60 but at least 3/60. On the 20ft visual acuity scale, severe reduction is defined as less than 20/200 but at least 20/400. On the decimal visual acuity scale, severe reduction is defined as less than 0.1 but at least 0.05.
Bone spicule pigmentation of the retina- MedGen UID:
- 323029
- •Concept ID:
- C1836926
- •
- Finding
Pigment migration into the retina in a bone-spicule configuration (resembling the nucleated cells within the lacuna of bone).
Undetectable electroretinogram- MedGen UID:
- 383742
- •Concept ID:
- C1855685
- •
- Finding
Lack of any response to stimulation upon electroretinography.
Attenuation of retinal blood vessels- MedGen UID:
- 480605
- •Concept ID:
- C3278975
- •
- Finding
Rod-cone dystrophy- MedGen UID:
- 1632921
- •Concept ID:
- C4551714
- •
- Disease or Syndrome
An inherited retinal disease subtype in which the rod photoreceptors appear to be more severely affected than the cone photoreceptors. Typical presentation is with nyctalopia (due to rod dysfunction) followed by loss of mid-peripheral field of vision, which gradually extends and leaves many patients with a small central island of vision due to the preservation of macular cones.
Pigmentary retinopathy- MedGen UID:
- 1643295
- •Concept ID:
- C4551715
- •
- Disease or Syndrome
An abnormality of the retina characterized by pigment deposition. It is typically associated with migration and proliferation of macrophages or retinal pigment epithelial cells into the retina; melanin from these cells causes the pigmentary changes. Pigmentary retinopathy is a common final pathway of many retinal conditions and is often associated with visual loss.