X-Linked Congenital Stationary Night Blindness
Bibliographic record
Abstract
Clinical characteristics X-linked congenital stationary night blindness (CSNB) is characterized by non-progressive retinal findings of reduced visual acuity ranging from 20/30 to 20/200; defective dark adaptation; refractive error, most typically myopia ranging from low (-0.25 diopters [D] to -4.75 D) to high (≥-10.00 D) but occasionally hyperopia; nystagmus; strabismus; normal color vision; and normal fundus examination. Characteristic ERG findings can help distinguish between complete X-linked CSNB and incomplete X-linked CSNB. Diagnosis/testing The diagnosis of X-linked CSNB is established in a male proband with characteristic clinical and electroretinogram (ERG) findings and a family history consistent with X-linked inheritance. Identification of a hemizygous pathogenic variant in CACNA1F or NYX by molecular genetic testing can confirm the diagnosis if clinical features are inconclusive. The diagnosis of X-linked CSNB may be established in a female proband with ERG findings suggestive of X-linked CSNB and identification of a heterozygous or biallelic pathogenic variant in CACNA1F or NYX by molecular genetic testing. Management Treatment of manifestations: Glasses or contact lenses to treat refractive error (myopia or hyperopia); conventional strabismus surgery may be required to improve binocularity or head posture. Surveillance: At a young age yearly eye examinations with refraction to identify and treat myopia as early as possible. Agents/circumstances to avoid: Reduced visual acuity and difficulties seeing at night may preclude driving a car or restrict the class of driving license. Genetic counseling By definition, X-linked CSNB is inherited in an X-linked manner. The father of an affected male will not have X-linked CSNB nor will he be hemizygous for the pathogenic variant. If the mother of the proband is a carrier, the chance of transmitting the pathogenic variant in each pregnancy is 50%. Males who inherit the pathogenic variant will be affected; females who inherit the pathogenic variant will be carriers and will usually not be affected. Males with X-linked CSNB will pass the pathogenic variant to all of their daughters and none of their sons. Carrier testing for at-risk relatives and prenatal testing for a pregnancy at increased risk are possible for families in which the pathogenic variant has been identified.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.013 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".