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Dr. Michael Chu O.D. (Honors) | Dr. Lauren Sim, O.D., BSc. (Honors)

We're on #123, 233-16th Ave NW, Calgary, AB T2M 0H5
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If, during an eye examination, your doctor has discovered a vision problem like nearsightedness, farsightedness or astigmatism, it’s likely that one of the next steps you’ll take will involve a phoropter. A phoropter is special machine used to switch multiple lenses in front of your eyes to correct your vision.
 
Phoropters look imposing—like space-age visors—but are really an ingenious way to quickly determine the exact vision correction needed by your individual eyes.
 
By having you look through the phoropter at a visual reference, image, or the “Big E” chart (the Snellen chart), your eye doctor will help guide you toward lenses that correct your vision impairment by switching lenses within the machine on the fly.

How does a phoropter work?

The process of switching lenses in front of your eyes is less involved than it may look, given the imposing nature of the device. A phoropter is used to manually determine “refraction”—exactly how a lens must be shaped and curved to correct your vision to a normal state, nothing more.
 
Phoropters are subjective however, based on your visual perception and response to your eye doctor’s questions. Is your vision better, or worse? With this lens, or this lens? How about now?
 
There are other procedures and technologies available that automatically measure the refraction needed within your eye and produce a “prescription” measurement without your input. These are called autorefractors and aberrometers.
 

 Special thanks to the EyeGlass Guide, for informational material that aided in the creation of this website. Visit the EyeGlass Guide today!

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We are now re-open for routine care and accepting appointments!

COVID-19 UPDATE:

The safety of our patients, clients and eye care team is our number one priority. As we re-open for routine care, strict measures and new protocols have been implemented to ensure that your visit to our clinic occurs in the safest manner possible. During the COVID-19 pandemic, some things will look a little different than what you may be used to. Please take a moment to review the link below for more information on the changes you can expect to see at your appointment.

COVID-19 UPDATE