O R T H O K E R A T O L O G YD R . J E F F R E Y B R O W E N , O . D . P R E S E N T S :

S O W H A T I S I T ?

• AKA “Ortho-K”

• A method of vision correction

• Neither glasses nor contact lenses

• Not surgery, like Lasik

• Ortho-K deals with a special process

• A patient is fitted with special lenses

• Not dissimilar to contacts

H O W A R E T H E Y D I F F E R E N T A N D H O W

D O T H E Y W O R K ?

• Unlike contacts, these are worn partially

• Usually at night

• Ortho-K lenses actively reshape the cornea

• Removed upon waking

• Allows the patient to see clearly throughout the day!

T H E M A N U F A C T U R E

• Many eye health companies offer it

• Most popular is from Bausch and Lomb

• However, the most integral part of the lenses is…

… G A S P E R M E A B I L I T Y

W H Y ?

• Gas permeability ensures

sufficient levels of oxygen get

to the eye.

• Not enough oxygen?

• Hypoxia may set in

• But the more permeable the

lens is…

• … the less chance hypoxia

can occur

C R T

• Corneal Refractive Therapy

• Similar to Ortho-K

• Also uses corrective lenses worn in sleep

• Developed by Paragon Vision Sciences

W H O ’ S A G O O D F I T

• Patient’s who aren’t good fits for surgery

• Temporary fix

• But it’s worn in the sleep, so it’s still glasses free!

T H A N K S T O O R T H O K A D E M Y . C O M +

V I S I Q U E O P T O M E T R I S T . C O . N Z F O R I M A G E S

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