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.
Reduced visual acuity- MedGen UID:
- 65889
- •Concept ID:
- C0234632
- •
- Finding
Diminished clarity of vision.
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.
Macular edema- MedGen UID:
- 75732
- •Concept ID:
- C0271051
- •
- Disease or Syndrome
Thickening of the retina that takes place due to accumulation of fluid in the macula as a nonspecific response to blood-retinal barrier breakdown. Macular edema is a common pathological response to a wide variety of ocular insults, most commonly after intraocular (e.g. cataract) surgery or in association with retinal vascular (e.g. diabetic eye disease, retinal vein occlusion) or inflammatory (e.g. uveitis) disease.
Macular atrophy- MedGen UID:
- 140841
- •Concept ID:
- C0423421
- •
- Finding
Well-demarcated area(s) of partial or complete depigmentation in the macula, reflecting atrophy of the retinal pigment epithelium with associated retinal photoreceptor loss.
Blindness- MedGen UID:
- 99138
- •Concept ID:
- C0456909
- •
- Disease or Syndrome
Blindness is the condition of lacking visual perception defined as a profound reduction in visual perception. On the 6m visual acuity scale, blindness is defined as less than 3/60. On the 20ft visual acuity scale, blindness is defined as less than 20/400. On the decimal visual acuity scale, blindness is defined as less than 0.05. Blindness is typically characterized by a visual field of no greater than 10 degrees in radius around central fixation.
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).
Perifoveal ring of hyperautofluorescence- MedGen UID:
- 892724
- •Concept ID:
- C4073099
- •
- 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.