June 2023
Volume 64, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2023
A Universal ADD Contact Lens for All Presbyopes
Author Affiliations & Notes
  • Kuang-mon Ashley Ashley Tuan
    Visioneering Technologies Inc., Georgia, United States
  • Doug Benoit
    Visioneering Technologies Inc., Georgia, United States
  • Footnotes
    Commercial Relationships   Kuang-mon Ashley Tuan VTI, Code E (Employment); Doug Benoit VTI, Code E (Employment)
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science June 2023, Vol.64, 1341. doi:
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      Kuang-mon Ashley Ashley Tuan, Doug Benoit; A Universal ADD Contact Lens for All Presbyopes. Invest. Ophthalmol. Vis. Sci. 2023;64(8):1341.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : A contact lens design using catenary optics to maximize the amount of relative plus power with minimal visual disturbance is evaluated for its optical characteristics and visual performance.

Methods : Raytracing with a model eye was used to characterize a catenary optic design to understand the optical profile in relationship to the retina. The modeling results were used to relate to clinical findings. The clinical standard to evaluate the performance of the Extended Depth of Focus (EDOF) class of ophthalmic optics, the Defocus Curve, was determined. The Defocus Curve is a means to evaluate wearer’s visual acuity at various viewing distances. The eye chart is placed at distance (0.00D) and the viewing lighting condition stays consistent. A series of positive and negative lenses (+2.00 to -4.00D, 0.50D steps) are used to simulate the changing vergences from changing viewing distances. The comparison data (Baseline) is collected from mature presbyopic (≥+2.00D ADD) subjects’ Best-Distance-Corrected spectacle lenses. The treatment data is collected from the same subjects wearing VTI’s Neurofocus Optics® technology contact lenses. The extended range of wearers’ DOF provides an uninterrupted clear vision from far to closer than 25cm (-4.00D and beyond). The Defocus Curve was also bench marked with EDOF intra-ocular lenses.

Results : The Catenary optic effectively created a non-interrupted long and skinny EDOF channel. The resulting halo spreads out over greater than ±30 degrees of retina. The intensity of halo per unit area was significantly reduced as the result of the large area of coverage. These two characteristics could provide easy neuroadaptation and allow the wearer to benefit from the EDOF without suffering from disturbing halos. Clinical Defocus Curves data (n=20, avg ADD 2.13±0.18) from this design show a full range of functional vision (better than 0.30 logMAR from 6m to 28cm) for mature presbyopes. Compared to baseline data, the range of Depth of Focus was extended by 2 diopters while distance and intermediate vision were maintained at 20/20 or better. The range of EDOF channel compares favorably to commercially available EDOF intra-ocular lenses.

Conclusions : Clinical data indicated a full range of functional vision without sacrificing distance visual quality. Contact lenses with a catenary optics design offer a universal ADD for emerging presbyopes to mature presbyopes while maintaining distance vision.

This abstract was presented at the 2023 ARVO Annual Meeting, held in New Orleans, LA, April 23-27, 2023.

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