presbyopic lens exchange (prelex) and multifocal iol implantation dr suresh k pandey suvi eye...
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Presbyopic lens exchange (PRELEX) and multifocal iol implantation dr suresh k pandey suvi eye institute kota indiaTRANSCRIPT
Presbyopic Lens Exchange (PRELEX) & Multifocal IOL Implantation
Dr. Suresh K PandeyDr. Vidushi Sharma
SuVi Eye Institute & Research CentreKota, India www.suvieye.comE-mail:[email protected] _+91 9351412449
Removal of the crystalline lens and replacement with a pseudophakic lens for the purposes of reducing or eliminating refractive errors
Dr. Suresh K Pandeywww.suvieye.com
Recent Terms- Presbyopic lens exchange (PRELEX) Refractive lens exchange
Older Terms- Clear lensectomy Clear lens phacoemulsification Clear lens extraction Clear lens replacement Clear lens exchange
PRELEX: Peals for Success
Patient SelectionBiometry (K Reading/IOL
Master)/OCTLens Power Calculation Meticulous SurgeryManaging Preoperative Astigmatism
Dr. Suresh K Pandeywww.suvieye.com
PRELEX: IOL Calculations
Holladay 2 formula is the most accurate
–Takes into account disparities in anterior segment and axial lengths by adding white-to-white corneal diameter and lens thickness into the formula
Dr. Suresh K Pandeywww.suvieye.com
PRELEX: IOL Calculations
SRK T formula is compared with the Holladay 2 as a final check
Hoffer Q formula is used for comparison in eyes < 22mm in length
Dr. Suresh K Pandeywww.suvieye.com
PRELREX: Patient Selection
Motivated refractive surgery patients – Avoid the fussy obsessive introspective
Patient Healthy cornea, and tear film Presbyopic, hyperopes are great candidates Avoid low myopes (in beginning) Be conservative with patients whose occupations involve frequent night driving
Dr. Suresh K Pandeywww.suvieye.com
Preoperative Measurements
Thorough Ocular ExaminationPost. Segment- including OCTBIOMETRY
Zeiss IOLMaster™/Lenstar (LS 900)
– Non-contact optical measurements– Partial coherence interferometry to measure axial length– Also measures corneal curvature and anterior chamber depth
Dr. Suresh K Pandeywww.suvieye.com
Presbyopic Lens Exchange (Videos)
Dr. Suresh K Pandeywww.suvieye.com
Piggyback IOL Implantation of Toric and Multifocal IOL (Videos)
Dr. Suresh K Pandeywww.suvieye.com
PRELEX: Refractive Refinement
LASIK
Piggyback IOL
Dr. Suresh K Pandeywww.suvieye.com
Conclusion
Refractive lens exchange constitutes a safe and effective refractive surgical modalityOffers substantial benefits in high hyperopes, presbyopes, and patients with borderline or soon to be clinically significant cataracts who are requesting refractive surgery
Dr. Suresh K Pandeywww.suvieye.com
Presbyopic Lens Exchange (PRELEX) & Multifocal IOL Implantation
Dr. Suresh K PandeyDr. Vidushi Sharma
SuVi Eye Institute & Research CentreKota, India www.suvieye.comE-mail:[email protected] _+91 9351412449
Further Reading
Dr. Suresh K Pandeywww.suvieye.com