Before revision: For an 80-year-old adult, it is 1.5 m (60 inches).www.vision-therapy.com The average amplitude of accommodation, in diopters, for a patient of a given age may be estimated by Hofstetter's formula: 18.5 minus one third of the patient 's age in years .Scheiman, Mitchell and Wick, Bruce.
After revision: For an 80-year-old adult, it is 1.5 m (60 inches).www.vision-therapy.com The average amplitude of accommodation, in diopters, for a patient of a given age may be estimated by Hofstetter's formula: 18.5 - (0.30 * patient age in years .Scheiman, Mitchell and Wick, Bruce.