References
- Bailey IL. Magnification for near vision. Optom Monthly 1980; 71: 119–122.
- Johnston AW. Technical note: The relationship between magnification and field of view for simple magnifiers. Aust J Optom 1982; 65: 74–77.
- Johnston AW.. A further note on handheld magnifiers. Rehabilitative Optometry 1984; Fall: 8–11.
- Chung STL and Johnston AW. Practical options for magnification and field of view of stand magnifiers. Clin Exp Optom 1989; 72: 140–147.
- Bullimore MA and Bailey IL. Stand magnifiers: An evaluation of new optical aids from COIL. Optom Vis Sci 1989; 66: 766–773.
- DIN 58383 Lupen, Arten und Optische KenngroBen (Magnifiers, types and optical characteristics). December 1971.
- Freeman MH. Optics 10th ed. London ; Butterworths 1990; 115–121.
- Bailey IL. Verifying near vision magnifiers – Part 2. Optom Monthly 1981; 72: 34–38.