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Related Experiment Videos

Threshold perimetry in tilted disc syndrome.

P D Brazitikos1, A B Safran, F Simona

  • 1Clinique d'Ophtalmologie, Hôpital, Gantonal Universitaire, Geneva, Switzerland.

Archives of Ophthalmology (Chicago, Ill. : 1960)
|December 1, 1990
PubMed
Summary

Tilted disc syndrome causes abnormal visual fields in all patients, with field loss extending beyond specific quadrants. Higher myopia in tilted discs correlates with more homogeneous visual field loss, aiding differential diagnosis.

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Area of Science:

  • Ophthalmology
  • Neuro-ophthalmology

Background:

  • Tilted disc syndrome is a congenital anomaly characterized by optic disc malformation.
  • Optic nerve hypoplasia is often associated with tilted disc syndrome, potentially affecting visual fields.

Purpose of the Study:

  • To investigate the characteristics of visual field defects in patients with tilted disc syndrome.
  • To explore the relationship between myopic refractive error and visual field loss patterns.
  • To assess the utility of short-term fluctuation in differentiating tilted disc syndrome from acquired visual field defects.

Main Methods:

  • Quantified visual field examination using the G1 Octopus program was performed on 12 consecutive patients (17 eyes) with tilted disc syndrome.
  • Linear regression analysis was employed to correlate visual field parameters with refractive error.

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  • Short-term fluctuation was analyzed to assess its diagnostic value.

    • Main Results:

    • All patients exhibited abnormal visual fields.
    • Field loss was most pronounced in the superotemporal quadrant but involved all quadrants, indicating non-sectorial optic nerve hypoplasia.
    • Increased mean defect correlated with increased myopia (P < .05).
    • Higher myopia was associated with decreased corrected loss variance, suggesting more homogeneous field loss.
    • Short-term fluctuation remained within normal ranges for all patients.

    Conclusions:

    • Optic nerve hypoplasia in tilted disc syndrome is not strictly sectorial.
    • Myopic refractive error influences the pattern of visual field loss, leading to more homogeneous defects in higher myopia.
    • Normal short-term fluctuation in visual fields may assist in distinguishing tilted disc syndrome from acquired visual disorders.