Dysfunctional Lens Index: A New Indicator in Lens Based Refractive Surgeries and Cataract Surgeries
Sushad Prasad *
The Department of Cornea, Cataract and Refractive Surgery, Sankara Eye Hospital, Plot No. 6, Central Spine Road, Sector 2, Sector 6, Vidyadhar Nagar, Jaipur, Pin - 302039, Rajasthan, India.
*Author to whom correspondence should be addressed.
Abstract
Lens-based refractive surgeries including Phakic IOLs and Refractive Lens Exchange are the procedure of choice when corneal ablative surgeries are contraindicated and in presbyopes. These procedures are gaining popularity over ablative procedures due it’s reversible nature. Dysfunctional Lens Index (DLI) in i-Trace aberrometer serves as an objective indicator of the lenticular quality of vision particularly useful in presbyopes for identifying and counselling patients with clinically clear lenses but dysfunctional. DLI complement other diagnostic measurements to assess lens function. Here, a comprehensive review has been presented regarding the applications of DLI in lens based refractive- cataract surgeries. Precise surgical planning is necessary when DLI is taken into account, as it is altered by factors other than lenticular causes of higher- order aberrations.
Keywords: Dysfunctional lens syndrome (DLS), dysfunctional lens index (DLI), refractive lens exchange (RLE), ray trace aberrometer, wavefront aberrometer, iTrace, phakic IOLs, ICL, implantable collamer lens, higher order aberrations, lens based refractive surgeries