From HPO
Photophobia- MedGen UID:
- 43220
- •Concept ID:
- C0085636
- •
- Sign or Symptom
Excessive sensitivity to light with the sensation of discomfort or pain in the eyes due to exposure to bright 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.
Cataract- MedGen UID:
- 39462
- •Concept ID:
- C0086543
- •
- Disease or Syndrome
A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule.
Achromatopsia- MedGen UID:
- 57751
- •Concept ID:
- C0152200
- •
- Disease or Syndrome
Achromatopsia is characterized by reduced visual acuity, pendular nystagmus, increased sensitivity to light (photophobia), a small central scotoma, eccentric fixation, and reduced or complete loss of color discrimination. All individuals with achromatopsia (achromats) have impaired color discrimination along all three axes of color vision corresponding to the three cone classes: the protan or long-wavelength-sensitive cone axis (red), the deutan or middle-wavelength-sensitive cone axis (green), and the tritan or short-wavelength-sensitive cone axis (blue). Most individuals have complete achromatopsia, with total lack of function of all three types of cones. Rarely, individuals have incomplete achromatopsia, in which one or more cone types may be partially functioning. The manifestations are similar to those of individuals with complete achromatopsia, but generally less severe. Hyperopia is common in achromatopsia. Nystagmus develops during the first few weeks after birth followed by increased sensitivity to bright light. Best visual acuity varies with severity of the disease; it is 20/200 or less in complete achromatopsia and may be as high as 20/80 in incomplete achromatopsia. Visual acuity is usually stable over time; both nystagmus and sensitivity to bright light may improve slightly. Although the fundus is usually normal, macular changes (which may show early signs of progression) and vessel narrowing may be present in some affected individuals. Defects in the macula are visible on optical coherence tomography.
High myopia- MedGen UID:
- 78759
- •Concept ID:
- C0271183
- •
- Disease or Syndrome
A severe form of myopia with greater than -6.00 diopters.
Dyschromatopsia- MedGen UID:
- 163559
- •Concept ID:
- C0858618
- •
- Disease or Syndrome
A form of colorblindness in which only two of the three fundamental colors can be distinguished due to a lack of one of the retinal cone pigments.
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.
Moderately reduced visual acuity- MedGen UID:
- 723196
- •Concept ID:
- C1301510
- •
- Finding
Moderate reduction of the ability to see. On the 6m visual acuity scale, moderate reduction is defined as less than 6/18 but at least 6/60. On the 20ft visual acuity scale, moderate reduction is defined as less than 20/70 but at least 20/200. On the decimal visual acuity scale, moderate reduction is defined as less than 0.3 but at least 0.1.
Horizontal pendular nystagmus- MedGen UID:
- 356175
- •Concept ID:
- C1866180
- •
- Congenital Abnormality
Nystagmus consisting of horizontal to-and-fro eye movements of equal velocity.
Monochromacy- MedGen UID:
- 1684677
- •Concept ID:
- C5201048
- •
- Disease or Syndrome
Complete color blindness, a complete inability to distinguish colors. Affected persons cannot perceive colors, but only shades of gray.
- Abnormality of the eye
- Abnormality of the nervous system