1. Vision screening in four-year-old children;Kohler, L.; Stigmar, G.;Acta PaediatrScand,1973
2. Refraction as a basis for screening children for squint and amblyopia;Ingram, R.M.;BrJ Ophthalmol,1977
3. Prediction of amblyopia and squint by means of refraction at age 1 year;Ingram, R.M.; Walker, C.; Wilson, J.M.; Arnold, P.E.; Dally, S.,1986
4. Ophthalmological serial examinations of 1200 children in their second year of life;Fabian, G.;Acta Ophthalmol (Kbh),1966
5. Changes in refraction between the ages of 1 and 3-5 years;Ingram, R.M.; Barr, A.;BrJ Ophthalmol,1979