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Flippers: Definition, Functions & Selection Guide
Latest company news about Flippers: Definition, Functions & Selection Guide


Flippers: Definition, Functions & Selection Guide

1. What Are Flippers?

Flippers (also called reversal lenses, flipper lenses, or ± lenses) are tools for assessing and training accommodative function. The device holds a pair of lenses: a minus (concave) lens (e.g., -2.00D for myopia correction) and a plus (convex) lens (e.g., +2.00D for hyperopia correction). Flipping between them:


  • The minus lens stimulates ciliary muscle contraction.

  • The plus lens promotes ciliary muscle relaxation.
    This alternating action tests/trains accommodative agility, widely used clinically to address accommodative dysfunction in children.



2. Key Functions

  1. Primary:

    • Train accommodative agility & reduce accommodative lag.

    • Enhance accommodative amplitude for insufficient accommodation.

  2. Secondary Benefits:

    • Improve accommodative ability in visually impaired patients.

    • Reduce eye fatigue by strengthening ocular muscles.

    • Enhance fusion function for binocular vision disorders.

    • Delay presbyopia onset in adults (~40 years).



3. How to Select Flippers

  1. Mandatory Professional Assessment:
    Always conduct a comprehensive binocular vision exam before selection. Never self-prescribe.

  2. Lens Strength Options:

    • Available in ±0.50D to ±2.50D increments.

    • Standard: ±2.00D/±2.50D (for normal function).

    • Low accommodative ability: Start with lower powers (e.g., ±0.50D/±1.00D). Avoid jumping to ±2.00D—risks blur and fatigue.

  3. Visual Acuity Cards:
    Pair with 20/30, 20/40, or 20/50 cards. Each set includes 5 cards:

    • Single "E" optotype

    • 3-letter, 4-letter, and 5-letter rows
      (Content varies slightly by manufacturer)



4. Usage Guidelines

  1. Essential Prerequisite:
    Use with full refractive correction (wear prescription glasses during training).

  2. Procedure:

    • Start with the plus lens to relax accommodation before flipping.

  3. Progressive Difficulty:
    Train with optotypes in this order:
    Single "E" → Single letters → 3-letter → 4-letter → 5-letter rows.

  4. Training Protocol:

    Stage Standard Target Goal
    Monocular 11 cycles/minute 20 cycles/minute
    Binocular 8 cycles/minute 18 cycles/minute

    *1 cycle = 1 flip (minus → plus → minus)*

    • Always begin monocularly. Advance to binocular training under optometrist supervision.

Pub Time : 2025-07-13 18:35:22 >> News list
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