One of MAXWELL’s unique capabilities is the precise, objective measurement of accommodative response of aberrations of any order. By means of a computer-controlled fixation target, stimulus/response and defocus/response curves may be recorded.

: Accommodation of a young patient was measured by making the internal target approach the patient in 20 steps. Red curve represents patient’s accommodative response to the shifting stimulus. Green line represents ideal response. This patient has over 5 D of accommodation.

: Accommodation graph of an older patient with less than 1 D of accommodation.