Holograms make for better vision tests

Jul 05, 2007

A new paper published in the July 1 issue of OSA's Optics Letters shows that researchers in Australia have created a new one-step test that uses holograms to diagnose the astigmatic error of the human eye, a key measurement in determining the appropriate prescriptions for eye glasses in patients.

This new technique adds to an earlier one, developed by the same researchers, for using a single hologram to measure another important property, the spherical refractive error of the eye.

In this new test, patients view a hologram consisting of sunburst patterns; by reporting which sunburst lines appear clearest, the eye doctor can obtain information he or she can use in determining the correct prescription for the patient.

Traditionally, patients look through a series of lenses until they find which one gives each eye the clearest view of a distant target such as an eye chart on a wall. This multi-step process of finding the right lens can be cumbersome and complex. Holography offers many advantages including simplicity, high speed and low cost and could open new doors in our understanding of human vision.

This approach still needs to be tested on young astigmatic individuals, whose nature of vision is not fully known. The same method has also been found to work well in measuring the refractive error of non-astigmatic subjects.

The results of that research will appear in a future issue of OSA’s journal JOSA-A.

Citation: "Holographic multivergence target for subjective measurement of the astigmatic error of the human eye," Optics Letters, Vol. 32, Issue 13, pp. 1926-1928.

Source: Optical Society of America

Explore further: Supercharging stem cells to create new therapies

Related Stories

Johns Hopkins study connects student vision with literacy

Jun 02, 2015

In the month after Alexander Dominguez joined Maygon Thompson's third-grade class at Charles Carroll Barrister Elementary School, he breezed through worksheets and quickly rose to be among the most studious members.

The Medical Minute: Pediatric eye safety

Jul 29, 2010

Yes, the dog days of summer are upon us; for most families that signals the longstanding tradition of back to school preparation. It’s time to begin the search for the perfect backpack and notebook, shop for new clothing ...

Recommended for you

Researchers reveal a genetic blueprint for cartilage

Jul 02, 2015

Cartilage does a lot more than determine the shapes of people's ears and noses. It also enables people to breathe and to form healthy bones—two processes essential to life. In a study published in Cell Re ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.