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Normal visual fields as assessed by computerized static threshold perimetry in patients with untreated primary
B Hallengren1, P Manhem, M Bramnert
1Department of Endocrinology, Lund University Clinics, General Hospital, Malmö, Sweden.
Acta Endocrinologica
|October 1, 1989
Summary
This study found that visual field defects are uncommon in patients with untreated primary hypothyroidism. Comprehensive testing revealed no significant abnormalities in most individuals with this thyroid condition.
Area of Science:
- Endocrinology
- Ophthalmology
- Clinical Medicine
Background:
- Primary hypothyroidism is associated with pituitary hyperplasia.
- Previous reports suggest a high prevalence of visual field defects in this condition.
- The current study investigates the actual occurrence of these defects.
Purpose of the Study:
- To prospectively evaluate the prevalence of visual field defects in patients with untreated primary hypothyroidism.
- To utilize sensitive perimetric techniques for accurate assessment.
- To clarify the relationship between hypothyroidism and visual field abnormalities.
Main Methods:
- Prospective study of 25 consecutive patients with untreated primary hypothyroidism.
- Assessment included clinical evaluation, serum TSH, and total T4 levels.
- Visual fields were tested using automated computerized perimetry (central 30 degrees) with statistical analysis.
Main Results:
- 23 out of 25 patients showed no visual field defects upon conventional and computer-assisted analysis.
- Two patients were excluded due to inadequate perimetry response or eyelid swelling.
- The findings indicate a low prevalence of visual field defects in this cohort.
Conclusions:
- Despite documented pituitary hyperplasia in hypothyroidism, visual field defects are not a common finding.
- This prospective study suggests that visual field impairment is rare in primary hypothyroidism.
- Further research may explore other potential causes of visual disturbances in endocrine disorders.