1. Handbuch der physiologishen Optik;von Helmholtz,1962
2. Is Helmholtz’s theory of accommodation correct?;Schachar;Ann Ophthalmol,1999
3. Experimental support for Schachar’s hypothesis of accommodation;Schachar;Ann Ophthalmol,1993
4. On the hydraulic suspension theory of accommodation;Coleman;Tr Am Ophth Soc,1986
5. The mechanism of accommodation and presbyopia in the primate;Schachar;Ann Ophthalmol,1995