Efficacy of Laser-Induced Increased Depth of Field for the S
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A Study was conducted to evaluate the visual outcomes of patients with presbyopic hyperopia, comparing the current standard of monovision treatment with a novel bilateral presbyopic LASIK (Custom-Q mode) technique.

The non-dominant eyes had a negative aspheric ablation profile designed using the Custom-Q nomogram after contact lens–simulated monovision measurements were obtained. With a positive aspheric ablation profile, the dominant eye was operated on. After the monovision trial and postoperatively, visual acuity checking, refraction, corneal asphericity (delta Q), higher order aberrations, and a satisfaction questionnaire were assessed.

Results:
--28 patients, with a mean age of 56.03 ± 4.31 years, were included in the study. At 6 months, 100% of patients achieved 20/20 or better binocular uncorrected distance visual acuity (UDVA) versus 57% in the monovision group, 100% of patients achieved 20/25 or better binocular uncorrected intermediate visual acuity versus 32% in the monovision group, and 92.86% of patients achieved 20/25 or better binocular uncorrected near visual acuity (UNVA) in both groups.

--In contact lens monovision simulation, no patient reached a UDVA of 20/50 or better, with only 3.6% having a UNVA of 20/40 or better. The questionnaire demonstrated high patient satisfaction.

In conclusion, the results show that increased depth of focus using negative spherical aberration modulation in the non-dominant eye is superior to contact lens monovision in the non-dominant eye. They also show how positive spherical aberration induction can help enhance intermediate and close vision in the dominant eye.

Source: https://journals.healio.com/doi/10.3928/1081597X-20201013-03#d1e681
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