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3. Presbyopia;Weale;Br. J. Ophthalmol.,1962
4. Effect of topical carbachol on the pupil and refraction in young and presbyopic monkeys;Törnqvist;Invest. Ophthalmol. Vis. Sci.,1966
5. Age-dependent loss of accommodative amplitude in rhesus monkeys: an animal model for presbyopia;Bito;Invest. Ophthalmol. Vis. Sci.,1982