From HPO
Night blindness- MedGen UID:
- 10349
- •Concept ID:
- C0028077
- •
- Disease or Syndrome
Inability to see well at night or in poor light.
Constriction of peripheral visual field- MedGen UID:
- 68613
- •Concept ID:
- C0235095
- •
- Finding
An absolute or relative decrease in retinal sensitivity extending from edge (periphery) of the visual field in a concentric pattern. The visual field is the area that is perceived simultaneously by a fixating eye.
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.
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).
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.