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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