The Area Under the Defocus Curve with MLA
The Defocus Curve provides a great deal of information that sometimes can be difficult to interpret by looking at the results for each single defocus step. For example, when we measure visual acuity at near (40 cm) we only have one result at a distance but when we measure a defocus curve we can have, if we go from -2.00 to -4.00 D in 0.50 D steps, up to 5 values that describe visual performance at near from 50 cm to 25 cm. How do we take advantage of all this information to draw conclusions about visual performance at near?