Explaining the “Quality of Vision”

The ideal shape of the eye: “The surface of the eye (cornea) is part of a clean sphere, the lens has a clean lens shape, and the contents (vitreous) let light pass without obstruction.”
But every eye has some optical distortion.

“Tests show my corrected vision is fine, but things are still hard to see.”
“My vision is good after eye surgery, but things are hard to see.”
“I want to know when to have cataract surgery.”
“My vision does not improve easily with glasses or contact lenses.”

We can now provide care using a “corneal topographer / whole-eye refraction analyzer.”

OPD (Optical Path Difference) Scan III (NIDEK)

• Corneal topography and refractive power analysis of the whole eye
• Vision simulation: shows in an image the cause of “things are hard to see even though my vision tests well”
• Explains whether the cause of the difficulty lies in the cornea or deeper inside the eye
• Wavefront analysis: identifies higher-order aberrations / irregular astigmatism
• Pupil diameter measurement in bright and dark conditions
• Analysis of the progression of corneal diseases such as keratoconus and corneal degeneration
• Judging indications for cataract surgery
• Whole-eye refraction analysis before and after surgery (cataract, LASIK, corneal transplant)
• What to do when glasses or contact lenses do not give good vision
• Support for contact lens prescription, etc.

The OPD-Scan III “simulation” shows:
• Simulated images of how a Landolt ring (C) and points of light look before and after correction
• How things look with dry eye
　etc.　
　When needed, we perform the analysis and explain it by showing the color map on the monitor in the examination room.

It is an excellent ophthalmic device that allows us to talk about the quality of vision.

Together with OCT angiography, the accommodation analyzer (Accommoref), and others,
the recent progress in ophthalmic medical devices is wonderful, and I truly respect the people who developed them.

Making full use of each device requires a considerable amount of additional learning.
Medical professionals need to keep learning across a wide range of fields throughout their lives.
I want to put the good fortune of being able to practice with good equipment to use for the patients of our community.

Thank you for your continued support.