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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Related Experiment Video

Updated: Jun 13, 2025

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

Published on: September 20, 2024

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Low Contrast Acuity Outcomes After SMILE and LASIK.

Rose K Sia, Isabel Eaddy, Hind Beydoun

    Journal of Refractive Surgery (Thorofare, N.J. : 1995)
    |September 10, 2024
    PubMed
    Summary
    This summary is machine-generated.

    Laser vision correction comparison: Wavefront-guided LASIK showed better early visual quality than SMILE. While both procedures offer excellent outcomes, LASIK demonstrated quicker low contrast visual acuity recovery.

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    Area of Science:

    • Ophthalmology
    • Refractive Surgery
    • Visual Optics

    Background:

    • Small Incision Lenticule Extraction (SMILE) and Laser-Assisted In Situ Keratomileusis (LASIK) are popular refractive surgical procedures.
    • Assessing early visual quality, particularly low contrast visual acuity (LCVA), is crucial for patient satisfaction and functional outcomes.

    Purpose of the Study:

    • To compare the early visual quality between SMILE and two types of LASIK (wavefront-guided and wavefront-optimized) using low contrast visual acuity measurements.

    Main Methods:

    • A secondary analysis of a harmonized dataset from two prospective cohort studies.
    • Included active-duty military personnel who underwent SMILE (n=37), WFG LASIK (n=51), or WFO LASIK (n=56).
    • Compared night vision, photopic, and mesopic LCVA up to 3 months postoperatively.

    Main Results:

    • Wavefront-guided LASIK showed significantly better night vision and photopic LCVA at 1 month compared to SMILE.
    • Wavefront-optimized LASIK also demonstrated significantly better photopic LCVA at 1 month versus SMILE.
    • However, WFO LASIK resulted in worse mesopic LCVA at 3 months compared to SMILE.

    Conclusions:

    • Both SMILE and LASIK (WFG and WFO) provide excellent refractive surgery outcomes.
    • Low contrast visual acuity recovery appeared to be faster after LASIK compared to SMILE.