1. The effect of lenses and convergence upon the state of accommodation of the eye;Adamson;Trans. Ophthal. Soc. U.K.,1939
2. The effect of sympathomimetic drugs upon the amplitude of accommodation;Biggs;Am. J. Ophthal.,1959
3. The shape of the lens equator;Brown;Exp. Eye Res.,1974
4. Fluctuations in accommodation under steady viewing conditions;Campbell;J. Physiol.,1959
5. Sensitivity of the eye to difference in focus;Campbell;J. Physiol.,1958