Clinical Effectiveness of Bilateral Implantation of Nonrefractive Hydrogel Corneal Inlay in Hyperopic Presbyopic Patients
Purpose
To evaluate clinical feasibility of bilaterally implanting hydrogel corneal inlay (Raindrop Near Vision Inlay, ReVision Optics, Inc., Lake Forest, CA, USA) in low hyperopic presbyopes.
Methods
All inlays were implanted under a femtosecond flap (1/3 CCT) onto the stromal bed, centered on the light constricted pupil. Twenty-six hyperopic (+1.00 to +1.75 D Sph, -0.75 D of cyl or less), presbyopes were implanted with Raindrop in the non-dominant eye, followed for 3 to 6 months, and then implanted with a second inlay in the dominant eye with no ablation. ETDRS visual acuity, task performances, visual symptoms and patient satisfaction were evaluated. The non-dominant and dominant eyes in the same subject responded similarly to the corneal inlay and therefore results are presented for binocular vision.
Results
Uncorrected binocular visual acuity for near (UNVA) improved from (mean) preop 0.53 logMAR to 0.0 logMAR at 12 months. Intermediate and distance binocular VA followed similar patterns to near (12 month visit: 0.02 logMAR UIVA, and -0.05 logMAR UDVA), all were stable over the follow-up periods. Photopic and mesopic task performance improved postoperatively at all distances. Moderate or worse halos were seen at 12 months in 10% of patients. Nearly all patients (95%) were Satisfied or Very Satisfied with the procedure according to self-reported questionnaire.
Conclusion
In low hyperopic presbyopes, bilateral implantation of the Raindrop Near Vision Inlay appears to be an effective alternative to correct presbyopia. It improves near, intermediate, and distance vision; task performance improves significantly at all distances for both good and dim lighting conditions.