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Practice Name

Sumner Vision

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Primary Location
3400 E Bayaud Ave Ste 485
Denver, CO 80209-2926
Phone: 303-321-1606
Fax: 303-321-0920

Office Hours

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High order aberrations (HOA) refer to complex imperfections of the optical system and are normally present in all eyes in minor unnoticeable amounts.  However, as a result of optical refractive surgeries such as Lasik, unnatural and irregular shape of the cornea can result in increases in HOA and thus result in halos double vision, smears, and other visual disturbances.  Improvement in lasers over the years has resulted in reducing HOAs but they are still present in some degree.

Measuring and Diagnosing High Order Aberrations

High order aberrations are measured with a wavefront aberrometer.  We use the Izon Aberrometer to measure the distortions of light as they pass through the patient's cornea.

Wavefront aberrometry helps in diagnosing both lower order and higher order vision errors based on how the light passing through the eye focuses or refracts.                      

These are some of the HOAs measured with our Izon Aberrometer.

High Order vs. Low Order Aberrations

Lower order aberrations are common vision errors like nearsightedness(myopia), farsightedness (hyperopia), and astigmatism.

High order aberrations are coma, spherical aberration, and trefoil.  These aberrations result in visual disturbances like glare, halos, starbursts, blurring, double vision, etc.

Exclusive Offer

Featured Services

Services We strive to provide complete care for our patients, including comprehensive medical eye examinations, professional contact lens care,  treatment of Dry Eye and other eye diseases, Diabetic eyecare, and an Optical Service with in office lab. Learn more about all the services we provide. Make An Appointment We will do our best to accommodate your busy schedule.  We see patients on Saturday!!  Schedule an appointment today!  Call 303-321-1606 Online Forms Our patient forms are available online so they can be completed in the convenience of your own home or office.  This will save you time when you come in for your appointment.

Office Hours

Sunday                  Closed
Monday                 Closed
Tuesday       9:00 AM  to  5:30 PM
Wednesday    9:00 AM to 5:30 PM
Thursday      9:00 AM  to 5:30 PM
Friday            9:00 AM to  5:30 PM
Saturday       8:00 AM to 1:00 PM

Meet the Doctor

Meet Dr. Larry Sumner Dr. Larry Sumner is a solo practitioner with over thirty-five years experience in primary eyecare. Read More


  •  303-321-1606
  • 3400 E Bayaud Avenue, Suite 485, Denver, CO 80209
  • email: lds@sumnervision.com

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