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Spatio-Temporal Optical Phase technology films reduced visual performance in myopia management tests. While comparable to other methods, clarity was worse with some designs, indicating potential visual trade-offs.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Spatio-Temporal Optical Phase (STOP) technology uses special films on spectacle lenses to potentially slow myopia progression.
  • The visual performance of STOP technology, crucial for patient acceptance and efficacy, has not been previously assessed.

Purpose of the Study:

  • To evaluate the visual performance of spectacle films utilizing Spatio-Temporal Optical Phase technology.
  • To compare the visual performance of four test film designs against a control film without optical elements.

Main Methods:

  • A randomized, single-masked, bilateral wear study involving 42 participants aged 18-40.
  • Collected subjective data on vision clarity, satisfaction, and purchase intent, alongside objective visual acuity (VA) and contrast sensitivity measures.
  • Analyzed data using linear mixed models and chi-squared tests with a significance level of 5%.

Main Results:

  • All test films demonstrated reduced visual performance compared to the control group across subjective ratings and purchase intent.
  • Specific designs (F-1, F-2) showed reduced binocular high-contrast VA at near distances.
  • No significant differences in most visual performance measures were found between the test films themselves or between the control and no-film conditions.

Conclusions:

  • The tested Spatio-Temporal Optical Phase films negatively impacted visual performance, though the reduction was comparable to other myopia management devices.
  • Three of the four tested film designs showed no significant difference in visual performance among themselves.
  • Further research is needed to balance the potential myopia control benefits with the observed visual performance trade-offs.