1. Abrahamsson M, Fabian G, Andersson AK, Sjöstrand J (1990) A longitudinal study of a population based sample of astigmatic children. I. Refraction and amblyopia. Acta Ophthalmol (Copenh) 68:428–434
2. Abrahamsson M, Fabian G, Sjöstrand J (1990) A longitudinal study of a population based sample of astigmatic children. II. The changeability of anisometropia. Acta Ophthalmol (Copenh) 68:435–440
3. Abrahamsson M, Sjöstrand J (2003) Astigmatic axis and amblyopia in childhood. Acta Ophthalmol Scand 81:33–37
4. Adler D, Millodot M (2006) The possible effect of undercorrection on myopic progression in children. Clin Exp Optom 89:315–321
5. Atkinson J, Anker S, Bobier W et al (2000) Normal emmetropization in infants with spectacle correction for hyperopia. Invest Ophthalmol Vis Sci 41:3726–3731