Page 4 - RayOne EMV Platform Brochure 2024_2.2

HOW RAYONE 2
EMV WORKS

How does

RayOne EMV work?

RayOne EMV is a truly non-diffractive IOL which does not use light splitting Expected vision with a
technology like many IOLs which increase depth of focus, resulting in low standard monofocal IOL
levels of dysphotopsia, similar to standard monofocal lenses. 1
RayOne EMV has a unique patented aspheric optic that induces controlled
positive spherical aberration.

Compared to a lens with zero spherical aberration, the carefully controlled
positive spherical aberration induced by RayOne EMV spreads light along
the visual axis, elongating the focal range from far into intermediate with
up to 1.5 D of depth of focus (per lens on the spectacle plane). Expected vision with
RayOne EMV
Below shows an illustration of a lens with zero aberration and a small focal
range (Figure 1), shown together with RayOne EMV with positive spherical
aberration and a larger focal range (Figure 2). Distance
Figure 1.
Zero spherical aberration

1.5 D
Distance Intermediate Distance
Figure 1. Figure 2.
Zero spherical aberration RayOne EMV
with positive
Figure 1 Figure 2
spherical aberration
Standard monofocal IOL RayOne EMV with positive
with zero spherical aberration spherical aberration

Why is positive spherical aberration good for extending depth of focus? 4

1.5 D
The positive spherical aberration induced by RayOne EMV Zero aberration lens EMV
Intermediate
Distance
complements the natural spherical aberration of the human
Figure 2.
RayOne EMV
cornea and gently increases depth of focus into the intermediate
with positive
spherical aberration
range - see illustrative Figure 3.
An equivalent negative spherical aberration IOL needs to first
negate the positive spherical aberration of the cornea, then add MTF
even more negative spherical aberration to induce any required
depth of focus improvements.
The total spherical aberration used on the RayOne EMV is Functional
therefore designed to be significantly less than for equivalent 1.5 D Depth of field vision
(approx 20/32)
negative spherical aberration extended depth IOLs, and the 1 0.5 0 -0.5 -1 -1.5 -2 -2.5 -3
RayOne EMV optical surface remains closer to spherical in form, Defocus (D)* Distance Intermediate Near
thus making performance more consistent under normal tilt and
decentration conditions. Figure 3