1. Prescribing cylinders the problem of distortion;Guyton;Surv Ophthalmol,1977
2. On the anomalies of accommodation and refraction of the eye,1864
3. Hin Fall von hochgradigem Hornhautstastigmatismus nach Staarextraction: Bessergung auf operativem Wege;Schiötz;Arch Augenheilkd,1885
4. History of radial keratotomy;Waring,1985
5. A suggestion of an operation to correct astigmatism;Bates;Arch Ophthalmol,1894