A crossover study of 36 subjects was conducted to study the difference between Gunnar Optiks computer spectacles and placebo lenses. The two pairs of eyeglasses were in similar frames, and both sets of lenses were made of similar resin with antireflective coating, but the placebo lenses were made without optical power or tint. Measurements of accommodation and subjective symptoms experienced with each type of glasses were made. Chi-squared testing revealed a significant difference in the following four symptoms: irritation or burning of the eyes, tearing, or watery eyes, dry eyes, and tired eyes. Pupil size was significantly different (p=0.001), but differences in the accommodative responses to the two types of eyeglasses were not significant.
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