Refractive Surgery Flashcards
Describe prk
- apply denatured alcohol is applied to the corneal epithelium to make it easier to remove
- use a contact lens as a bandage after
What helps a ton with making PRK not as painful
Using the denatured alcohol to kill the epithelial cells
Describe LASIK
- flap with microkeratome that goes into the corneal stroma (push the cornea down then create the flap)
- 150 microns thick (110-120)
- laser re shapes and corrects
LASEK?
- improvement
- ultra thin hinged flap in epithelial layer
- alcohol still used
- amoiles brush and modified epi K(???)
EPI-LASEK?
- like LASEK, but a microkeratome is used to lift the flap of only epithelial tissue
- the flap is laid back down to act as scaffolding for the new epithelial layer
Bladeless LASIK?
- eliminates the blade (microkeratome)
- now they use a femtosecond laser to create the flap
- use an excimer laser to reshape the cornea
What are some other names for bladeless LASIK?
- all-laser LASIK
- Blade free LASIK
- femtoLASIK
- intralase LASIK
What kind of laser is the femtosecond laser? Excimer?
- femtosecond:infrared
- excimer: UV
What is wavefront analysis? Why is it beneficial?
- used to measure exactly how light travels through the eye
- excimer lasers wit built in wavefront can automatically adjust to aberrations
- this is most effective for patients with high order aberrations
What are the two types of wavefront?
- customized: they try and match up every peak and every valley
- optimized: try and just create a more prolate cornea
What are implanted lenses a good option for?
- HIGH myopes.
- more than 4-6
- in this procedure, the patients natural lens is left in place.
With implantable lenses, where is the lens attached?
- the natural lens is left in place.
- ICL goes in front of the iris
- Verisyse goes behind the iris
Implantable lenses is what kind of procedure?
- intraocular procedure. Goes deeper. Better results. Oversees calls it an implantable contact lens
- Phakic IOL
What is refractive lens exchange? What kind of patients is it good for?
- like cataract surgery, but instead of removing the natural lens because it is cloudy, they replace a clean lens with a clean lens that is a different shape
- high hyperopia
How can cataract surgery be considered a refractive surgery?
-lens implants for cataract surgery can also correct bear vision and corneal astigmatism (accommodating IOLs and toric IOLs)
What is the take home message for when people are selling new products?
-think about what they’re selling you. Cool.
