ORA Intraoperative Aberrometry
In Redwood City and the Peninsula
A live measurement taken during cataract surgery that helps confirm your lens power and position before your surgery is finished.
A second check, made in the operating room
Before cataract surgery, careful scans of your eye are used to choose the power of your new lens. For most eyes these measurements work very well. Some eyes are harder to measure, and that is where ORA helps.
ORA, made by Alcon, uses wavefront aberrometry to measure how your eye focuses light during surgery, right after the cloudy lens is removed. Dr. Philip Ngai uses this real time information to confirm or refine the lens power and, for toric lenses, the exact alignment of the lens before your surgery is complete.
ORA is an optional part of premium cataract surgery, and it is available at every surgery center where Dr. Ngai operates. See where we operate.
Three steps during your surgery
Measure
After the cataract is removed, ORA takes a quick reading of how your eye focuses light, with no lens in place.
Confirm
Your surgeon compares that reading with your pre surgery plan to confirm the lens power, or adjust it when the numbers suggest a better choice.
Align
For toric lenses that correct astigmatism, ORA helps guide the lens to the best rotation, and can check the result before surgery ends.
When ORA adds the most value
ORA is an optional part of premium cataract surgery. Your surgeon will let you know if it is a good fit for your eyes and goals.
Prior LASIK, PRK or RK
Laser vision correction and older RK surgery change the shape of the cornea, which makes standard lens calculations less reliable. ORA adds a direct measurement.
Toric and premium lenses
Lenses that correct astigmatism or reduce the need for glasses depend on precise power and alignment. ORA helps fine tune both.
Very long or very short eyes
Strong nearsightedness or farsightedness can make lens calculations harder. A measurement during surgery gives an extra layer of confidence.
Learn about premium lens implants · Surgery costs and insurance
ORA FAQs
Is ORA a different kind of surgery?
No. ORA is a measurement tool used during your cataract surgery. The surgery itself is the same small incision, sutureless procedure, and ORA adds only a few moments of measurement.
Is ORA available where my surgery is done?
Yes. ORA is available at every surgery center where Dr. Ngai operates.
Who benefits most from ORA?
ORA is most helpful for eyes that are harder to measure before surgery, such as eyes that had LASIK, PRK or RK, very long or very short eyes, and eyes receiving a toric or other premium lens.
Does ORA guarantee I will not need glasses?
No measurement can promise perfect vision. ORA gives your surgeon more information to fine tune your lens choice and position, which can improve the chance of reaching your vision goal.
Is ORA covered by insurance?
Insurance covers standard cataract surgery. ORA is an optional part of premium cataract surgery and is not covered by insurance. If you choose premium cataract surgery, we explain your options and any out of pocket cost in writing before surgery.
Will I feel anything different?
No. You will be comfortable and relaxed during surgery. You may be asked to look at a light for a few seconds while the measurement is taken.
Precision for your new lens
Call, text or request an appointment online. We verify your insurance before your visit.
162 Clinton Street, Redwood City, CA 94062 · Monday to Friday, 8am to 5pm