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4. Temporal stability of the dark focus of accommodation. Miller RJ. Am J Optom Physiol Opt; 1978 Jul; 55(7):447-50. PubMed ID: 727221 [Abstract] [Full Text] [Related]
5. Stability of measures of the dark focus of accomodation. Mershon DH, Amerson TL. Invest Ophthalmol Vis Sci; 1980 Feb; 19(2):217-21. PubMed ID: 7351357 [Abstract] [Full Text] [Related]