London Eye Hospital
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Light Adjustable Lens
(LAL) Technology
(LAL) Technology
The Light Adjustable Lens silicone was developed from the same material
used in modern implants available today worldwide. Millions have been
implanted over the last decade and this material has been shown to be
completely safe and will not cause a reaction in the eye.
What makes the LAL unique is the incorporation of unique materials called
'macromers' which were developed by Calhoun Vision Inc. in the USA led
by a team of Nobel Prize winning Scientists.
The macromers are designed to be sensitive to harmless ultraviolet light of a
specific wavelength. When this light is shone into the eye the macromers
link together in a very controlled and specific way called
photopolymerisation.
used in modern implants available today worldwide. Millions have been
implanted over the last decade and this material has been shown to be
completely safe and will not cause a reaction in the eye.
What makes the LAL unique is the incorporation of unique materials called
'macromers' which were developed by Calhoun Vision Inc. in the USA led
by a team of Nobel Prize winning Scientists.
The macromers are designed to be sensitive to harmless ultraviolet light of a
specific wavelength. When this light is shone into the eye the macromers
link together in a very controlled and specific way called
photopolymerisation.
Mechanism of Action
After Mr Qureshi has implanted the lens the patient's vision is evaluated when the eye has
healed typically at about 2 weeks. Any adjustment required to perfect the vision is carried
machine designed to deliver the exact dose and profile of light onto the LAL to correct any
residual errors.
Light adjustability of the lens is based on the principles of photochemistry and diffusion
whereby components incorporated into the lens matrix are photopolymerised on exposure
to the UV light.
This means that the light affects the macromers to cause very specific swelling or thinning of
the lens implant changing the focus to give the patient the best vision possible for their
eye. The process takes less than 2 minutes and can be repeated for further adjustment if
required. Once the desired prescription is achieved further UV light is passed through the
lens to 'fix' it in position to make the adjustment permanent.
After Mr Qureshi has implanted the lens the patient's vision is evaluated when the eye has
healed typically at about 2 weeks. Any adjustment required to perfect the vision is carried
machine designed to deliver the exact dose and profile of light onto the LAL to correct any
residual errors.
Light adjustability of the lens is based on the principles of photochemistry and diffusion
whereby components incorporated into the lens matrix are photopolymerised on exposure
to the UV light.
This means that the light affects the macromers to cause very specific swelling or thinning of
the lens implant changing the focus to give the patient the best vision possible for their
eye. The process takes less than 2 minutes and can be repeated for further adjustment if
required. Once the desired prescription is achieved further UV light is passed through the
lens to 'fix' it in position to make the adjustment permanent.
Mr Bobby Qureshi adjusts the
implant after surgery with the Digital
Light Delivery Device.
implant after surgery with the Digital
Light Delivery Device.
and customized for each
individual to give the
sharpest vision possible.
individual to give the
sharpest vision possible.