Problems in the evaluation of data.
D001251:Astigmatism / Q000175:diagnosis / Q000534:rehabilitation; D001331:Automation; D005139:Eyeglasses; D006801:Humans; D009885:Ophthalmology / Q000379:methods*; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000175:diagnosis / Q000534:rehabilitation