Reading Speed Depth of Focus With New Extended Depth of Focus IOL
Purpose
High quality of vision and reading speed performance are the target for cataract presbyopia patients. This study is to evaluate the performance of an extended depth of focus (EDOF) IOL. To compare the reading speed and defocus curve using a tablet quality of vision test, between monofocal, multifocal and EDOF IOLs after a phacoemulsification surgery.
Methods
Three groups of patients, 10 eyes each, had an uneventful cataract phacoemulsification procedure and were implanted with monofocal IOL (group 1), Multifocal IOL (Group 2) and extended depth of focus (EDOF) IOL (Group 3). Near visual acuity, reading speed, depth of focus and a near and intermediate quality of vision score were tested at 1, 4 weeks, and 2 months.
Results
Group 1 with monofocal IOL had a good visual acuity at far but needed glasses to achieve a good quality of vision and reading speed at intermediate and near. Group 2 with multifocal IOL achieved good uncorrected far and near visual acuity, good reading speed and a typical two-peaked defocus curve shape. Group 3 with extended depth of focus (EDOF) IOL had a continuous good far intermediate and near visual acuity with good reading speed. The defocus curve had a wide and high one peak shape.
Conclusion
The multifocal and EDOF groups had a spectacle independence at far, intermediate and near distances. Patients demonstrated high satisfaction for the reading quality. The EDOF IOL group also performed well at the intermediate distance. The quality of vision test for intermediate and near had high score in all groups but the monofocal group needed spectacles.