Smart Autofocusing Eyeglasses

April 17, 2024 updated by: University of Utah

Cyber Physical System for Smart Corrective Eyeglasses

A high-performance smart eyeglasses system with integrated sensing, actuation, control and data collection is being developed at the University of Utah. These smart eyeglasses use tunable lenses and integrated sensor technologies to correct blurred vision caused due to a major age-related condition called presbyopia.The objective of this study is to test this smart system on patients suffering from presbyopia aged 45 and above. The researchers intend to study the effect of these smart eyeglasses by qualitatively investigating the patient's visual acuity with this smart system. The results of this study and subsequent research have the potential to lead to major lifestyle improvements and better treatment for millions of presbyopic patients that are constrained by the limitation of current corrective eyeglass technologies. There are two main sources of fairly well understood problems that lead to presbyopia and loss of the eye focusing function. The adaptive eyeglasses used in these tests do not fix any of the internal eye problems. They just compensate externally for the loss of the eye focusing function caused by presbyopia. As such, the investigators intend to evaluate our system's effectiveness in terms of the sharpness of the perceived images.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Eye defects occur when the eye cannot focus images from the outside world. This results in blurred vision, which sometimes is so severe that it causes visual impairment. Among the many vision defects, presbyopia is an inevitable, irreversible, universal age-related condition where the crystalline lens in the eye loses its accomodation orthe ability to change the optical power. This defect occurs as a natural result of aging and will ultimately affect any person reaching advanced enough age. It was estimated in 2005 that over 1 billion people worldwide suffered from presbyopia, with approximately 400 million suffering from near vision loss due to the lack of correction technologies.

The most inexpensive and commonly used tools to correct vision errors are fixed power eyeglasses, which haven't seen any improvement since the mid-1800s. Conventional eyeglasses are an ancient piece of technology which originated in Europe's middle ages. A major drawback of such eyeglasses is that they can only correct the lack of accomodation at a particular object distance, since they use fixed power lenses. As a result, conventional eyeglasses can produce sharp images for objects located either far away or near the observer but not both. Bifocal, multifocal and progressive lenses can partially alleviate vision defects, but at the expense of reduced and fragmented field of view. As an example, multifocal lenses have different lens powers in different regions of the lens. With such lenses, it is not possible to see objects clearly over the entire visual field. Further, the effectiveness of conventional eyeglasses is not monitored outside the optometrist's office.

The proposed smart eyeglasses system uses a combination of large-aperture fluidic lenses, ultra-light actuators, object distance sensors and embedded control, communications and computing electronics to continuously produce sharp and focused images at any object range. They can also collect the behaviour and characteristics of the observer's eyes to gauge the effectiveness of the technology and adapt to observer's visual degradation over age.

Study Type

Observational

Enrollment (Actual)

17

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

  • United States
    • Utah
      • Salt Lake City, Utah, United States, 84112
        • Moran Eye Center, University of Utah

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

45 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Any individual above 45 years of age with symptoms of presbyopia.

Description

Inclusion Criteria:

  • Presbyopic
  • Less than 1.0 diopter astigmatism
  • Eyeglass prescription between -2.5 and +2.5, correctable to 20/20

Exclusion Criteria:

  • Artificial intraocular lens
  • Any ocular pathology that would inhibit accommodation of the natural lens

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Only
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Accommodation response of the natural lens of the eye with smart eyeglasses technology
Time Frame: 60 minutes
60 minutes

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Utah

Collaborators

National Institute for Biomedical Imaging and Bioengineering (NIBIB)

Investigators

  • Principal Investigator: Carlos H Mastrangelo, PhD, University of Utah

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

March 1, 2019

Primary Completion (Actual)

December 30, 2022

Study Completion (Actual)

December 30, 2022

Study Registration Dates

First Submitted

April 9, 2019

First Submitted That Met QC Criteria

April 9, 2019

First Posted (Actual)

April 11, 2019

Study Record Updates

Last Update Posted (Actual)

April 19, 2024

Last Update Submitted That Met QC Criteria

April 17, 2024

Last Verified

November 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRB # 114415
  • 5U01EB023048 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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