Visual Function in Patients Implanted with the Tetraflex and the Tetraflex HD Intraocular Lens

1. Sunil Shah¹
2. Shehzad Naroo²
3. Leon Davies²
4. Phillip Buckhurst²
5. James Wolffsohn

¹Midland Eye Institute, Solihull, United Kingdom
²Aston University, Birmingham, United Kingdom

Purpose: To examine the performance of patients implanted bilaterally with a Tetraflex IOL in one eye and the Tetraflex HD in the other.

Methods: Twenty patients were implanted with the Tetraflex IOL in one eye and the Tetraflex HD IOL in the other. Uncorrected and Best distance corrected visual acuity at distance (BCVA), intermediate (BDCIVA) and near (BDCNVA) (logMAR chart), contrast sensitivity (Pelli-Robson chart) and defocus curves from +1.5D to -5.0D in 0.5D randomised steps were measured in both photopic (85cd/m2) and mesopic (3cd/m2) conditions.

Results: The Tetraflex HD IOLs showed improved best corrected distance visual acuity in comparison to the Tetraflex IOL -0.04±0.08logMAR to -0.04±0.07logMAR. BCNVA was marginally better for the tetraflex HD 0.44±0.14LogMAR to 0.51±0.11LogMAR. The Tetraflex HD IOL showed a consistently better defocus curve profile in comparison to the Tetraflex IOL over a range of 0.00D to -1.50D.

Conclusions: The Tetraflex HD demonstrates improved distance, intermediate and near visual acuity at the 3 month stage in comparison to the standard Tetraflex IOL.