Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Amplitude of accommodation: population and methodological differences.

I K Kragha

    Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Measurement of amplitude of accommodation.

    Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·1989
    Same author

    Declared vs. true age of patients.

    Optometry and vision science : official publication of the American Academy of Optometry·1989
    Same author

    Causes of blindness in northern Nigeria.

    American journal of optometry and physiological optics·1987
    Same author

    Prevalence of glaucoma in an eye hospital in Nigeria.

    American journal of optometry and physiological optics·1987
    Same author

    Eye diseases in northern Nigeria: prevalence, age and sex differences.

    Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·1987
    Same author

    The distribution of refractive errors in Nigeria.

    Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·1987

    This study surveys accommodation amplitudes globally and compares Nigerian patient data with prior findings. It suggests temperature has a smaller effect on amplitude decrement than previously believed.

    Area of Science:

    • Ophthalmology
    • Optometry
    • Vision Science

    Background:

    • The amplitude of accommodation is a critical measure of visual function.
    • Variations in accommodation amplitude are influenced by numerous factors, including geography and environment.
    • Previous studies have established a general understanding of accommodation amplitude decline with age.

    Purpose of the Study:

    • To present a comprehensive literature survey of accommodation amplitudes across diverse global populations.
    • To compare recent findings on accommodation amplitude in Nigerian patients with existing international data.
    • To re-evaluate the impact of environmental temperature on the decrement of accommodation amplitude.

    Main Methods:

    • Conducted a systematic literature review to gather data on accommodation amplitudes from various countries.

    Related Experiment Videos

  • Performed objective and subjective measurements (push-up and minus-lens tests) on 447 patients in Nigeria.
  • Analyzed and compared the Nigerian patient data against the compiled international literature.

    • Main Results:

    • The Nigerian cohort exhibited accommodation amplitude values comparable to some international data, with specific regional variations noted.
    • A statistically significant correlation between age and reduced amplitude of accommodation was confirmed.
    • The data indicated a less pronounced effect of ambient temperature on the decline of accommodation amplitude than previously reported in literature.

    Conclusions:

    • Accommodation amplitude exhibits considerable international variability, influenced by factors beyond age.
    • Environmental temperature may play a lesser role in the physiological decline of accommodation amplitude than commonly assumed.
    • Further research is warranted to elucidate the complex interplay of factors affecting accommodation amplitude in different populations.