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Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
Published on: March 29, 2022
Peripheral optical errors and their change with accommodation differ between emmetropic and myopic eyes.
Linda Lundström1, Alejandro Mira-Agudelo, Pablo Artal
1Laboratorio de Optica, Departamento de Física, Universidad de Murcia, Campus de Espinardo, Murcia, Spain. linda@um.es
Journal of Vision
|September 19, 2009
Summary
Peripheral myopia differs between emmetropic and myopic eyes, especially with accommodation. This difference, which is asymmetric across the visual field, may offer clues to understanding myopia progression.
Area of Science:
- Ophthalmology
- Optometry
- Vision Science
Background:
- Myopia progression is linked to retinal image quality, but triggers remain unclear.
- Peripheral optics differences between emmetropic and myopic eyes may explain myopia onset.
- Accommodation's impact on peripheral optical quality requires further investigation.
Purpose of the Study:
- To investigate peripheral optical quality in relation to accommodation.
- To compare peripheral optics between emmetropic and myopic individuals.
- To identify potential factors contributing to myopia progression.
Main Methods:
- Used a Hartmann-Shack wave front sensor for peripheral refraction and aberration measurements.
- Assessed off-axis optical quality across +/-40 degrees horizontally and +/-20 degrees vertically.
- Measured optical quality under two accommodation states (0.5 D and 4.0 D).
Main Results:
- Emmetropes exhibited higher relative peripheral myopia than myopes.
- This difference was asymmetric across the visual field.
- Peripheral myopia increased with accommodation in emmetropes, but not consistently in myopes.
Conclusions:
- A notable difference in peripheral defocus exists between emmetropic and myopic eyes, influenced by accommodation.
- Accommodation alters peripheral optical quality differently in emmetropes and myopes.
- These findings provide insights into potential mechanisms driving myopia progression.
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