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Correction of night myopia and glare for night driving
1Division of Ophthalmology, Women's College Hospital, Toronto, Ont.
Objective:
To assess the effectiveness of treating night myopia.
Setting:
Ophthalmic practice in Toronto.
Patients:
Sixty-one patients aged 18 to 60 years with night myopia and no ocular disease followed for 1 to 14 months (phase 2). Phase 1 (32 patients) was abandoned because of problems with the tint chosen.
Interventions:
Assessment of night myopia with a laser speckle generator, prescription of minus lenses with or without a tint.
Main Outcome Measures:
Magnitude of night myopia, subjective change in symptoms of night myopia.
Results:
Nineteen patients (31%) could not benefit from minus or tinted lenses, and eight were lost to follow-up. Of the remaining 34 patients 22 (65%) reported marked improvement in night driving, 9 (26%) had moderate improvement and 3 (9%) had minimal improvement.
Conclusions:
Many patients with night driving difficulties can be helped with an increased myopic correction worn at night.