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Development of an In Vitro Ocular Platform to Test Contact Lenses
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AEROMEDICAL ASPECTS OF CONTACT LENSES (SOFT AND SEMISOFT).

Gkg Prasad1, M K Vyawahare2, R Kapur3

  • 1Classified Specialist (Ophthalmology) AFCME, New Delhi 110 010.

Medical Journal, Armed Forces India
|August 4, 2017
PubMed
Summary
This summary is machine-generated.

Soft and semi-soft contact lenses are compatible with aviation environments. Both low and high water content soft lenses, and extended wear semi-soft lenses, performed well during various flight conditions.

Keywords:
AccelerationAviation stressesContact lensesHypoxiaVibration

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Area of Science:

  • Ophthalmology
  • Aerospace Medicine
  • Materials Science

Background:

  • Contact lens wear is common among aircrew.
  • The aviation environment presents unique stresses that could affect contact lens performance and ocular health.
  • Previous research on contact lens compatibility in aviation is limited.

Purpose of the Study:

  • To assess the compatibility of soft and semi-soft contact lenses under various aviation stresses.
  • To evaluate the performance of different types of contact lenses (varying water content and wear type) in simulated and actual flight conditions.

Main Methods:

  • A clinical study involving 20 subjects (11 aircrew, 9 non-aircrew).
  • Participants wore soft lenses (38%, 50%, 78% water content) or semi-soft lenses (daily and extended wear).
  • Environmental trials included ground-based simulations of hypoxia, rapid decompression, acceleration, pressure breathing, vibration, and high temperature, followed by inflight trials on various aircraft.

Main Results:

  • Soft contact lenses with low, medium, and high water content demonstrated compatibility.
  • Extended wear semi-soft contact lenses (large diameter) were also found to be compatible.
  • All tested lens types performed well across different simulated and inflight aviation conditions.

Conclusions:

  • Soft and extended wear semi-soft contact lenses are suitable for use in aviation environments.
  • The tested contact lens materials and designs do not appear to be adversely affected by typical aviation stresses.
  • Aircrew can confidently wear compatible contact lenses during flight operations.