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Visual and nonvisual variables implicated in monovision wear

R du Toit1, J T Ferreira, Z J Nel

  • 1Department of Optometry, Rand Afrikaans University, Johannesburg, South Africa.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|March 21, 1998
PubMed
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Psychological factors, specifically "superego strength," significantly predict successful monovision contact lens wear. This finding offers a profile for successful monovision wearers, enhancing patient selection.

Area of Science:

  • Ophthalmology
  • Optometry
  • Psychology

Background:

  • Monovision contact lens wear success is influenced by both visual and psychological factors.
  • Previous research lacked documentation on the link between psychological traits and monovision outcomes.
  • This study aimed to identify key visual and psychological predictors of successful monovision wear.

Purpose of the Study:

  • To investigate the relative importance of visual and psychological factors in predicting monovision contact lens wear success.
  • To develop a profile of individuals likely to succeed with monovision correction.
  • To establish a scientific basis for the role of psychological factors in monovision adaptation.

Main Methods:

  • A cohort of 67 participants, new to monovision, underwent a 2-week adaptation period with distance contact lenses.

Related Experiment Videos

  • Participants then wore monovision contact lenses for an additional 2 weeks.
  • Psychological assessment utilized Cattell's 16 Personality Factor (16 PF) test, alongside visual tests measuring binocular and monovision stereopsis.

    • Main Results:

    • 67% of participants indicated willingness to continue monovision wear based on their visual experience.
    • Discriminant analysis identified "superego strength" from the 16 PF test and the difference in stereopsis scores as significant predictors of success.
    • Predictive accuracy for successful monovision wear reached 68% using these factors.
    • Factors such as age, gender, pupil size, and motivation did not significantly predict success.

    Conclusions:

    • Psychological factors, particularly "superego strength," play a crucial role in the success of monovision contact lens wear.
    • The study successfully identified a combination of psychological and visual metrics for predicting monovision wearer success.
    • These findings underscore the importance of considering personality traits in patient selection for monovision correction.