The document discusses wavefront aberrometry, which is a technique used to measure aberration in the eye by analyzing wave fronts. It is used for refractive surgery, contact lens fitting, early diagnosis of keratoconus, and to measure lower order and higher order of aberration. Wavefront aberrometry provides information about aberrations in the eye beyond what a standard eye exam can detect.

1. By ARA

2. It is used to measure aberration in the
eye by analysing wave fronts.

3. Scheiner’s disc

4. ▪Refractive surgery.
▪Contact lens fitting.
▪Early diagnosis of keratoconus.
▪To measure lower order and higher order
of aberration.