Contrast Sensitivity and Limits of Vision

Comparison of contrast sensitivity, depth of field and ocular wavefront aberrations in eyes with an IOL with zero versus positive spherical aberration

“…This is in an effort to offset all [51,52] or part [53,54] of the individual eye's corneal SA, while not overcompensating and thereby inducing whole-eye negative SA, given that a wide range of corneal SA has been reported. In individual patients, depending on their uncorrected defocus term and other higher-order aberrations, either positive or negative residual spherical aberration can have a deleterious effect on image quality.…”

Contrast sensitivity measurement with 2 contrast sensitivity tests in normal eyes and eyes with cataract

“…To measure visual quality or functional vision, a contrast sensitivity test is required. [6][7][8][9][10] Certain diseases cause isolated loss of contrast sensitivity, even when visual acuity is normal, and others can lead to loss of contrast sensitivity that is more pronounced than the loss of visual acuity. 11 In these cases, the results of a contrast sensitivity test can help clinicians better understand a patient's impairment, make an accurate diagnosis, monitor the efficacy of treatment, and modify treatment.…”

Functional visual outcomes of cataract surgery in patients with 20/20 or better preoperative visual acuity

“…However, there is no universally accepted standard or interpretation for contrast sensitivity or glare disability testing. 3,4 Given the inadequacy of these tests, questionnaires such as the Visual Function 14 (VF-14) were developed to quantify the functional disability of patients with cataract and other vision-limiting diseases. 5,6 The current Preferred Practice Patterns state that ''the primary indication for surgery is visual function that no longer meets the patient's needs.''…”