Single Vision Correction for Myopia, Hyperopia, and Presbyopia
Single vision lenses are designed to correct vision at a specific focal distance—either for distance or near vision. Below is how single vision lenses help address different vision conditions.

Myopia (Nearsightedness) – Single Vision Distance Lenses
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Issue: Distant objects appear blurry, while near objects remain clear.
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Cause: Light focuses in front of the retina due to an elongated eyeball or a steeply curved cornea.
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Correction:
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Single Vision Distance lenses use minus (-) power to refocus light onto the retina, restoring clear distance vision.
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Best for: Driving, watching TV, reading street signs, and recognizing faces from a distance.

Hyperopia (Farsightedness) – Single Vision Distance or Reading Lenses
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Issue: Both near and distant objects can appear blurry, depending on the severity of hyperopia.
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Cause: Light focuses behind the retina due to a shorter eyeball or a flatter cornea.
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Correction:
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Mild hyperopia: Distance vision may be relatively clear, but near work can cause eye strain or discomfort.
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Moderate to high hyperopia: Both near and distant vision can be blurry, requiring correction.
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Single Vision Distance lenses help improve far vision, while Single Vision Reading lenses enhance near focus.
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Best for:
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For near vision strain: Use Single Vision Reading lenses for reading, smartphone use, and detailed tasks.
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For general vision correction: Use Single Vision Distance lenses for everyday activities.
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Presbyopia (Age-Related Near Vision Loss) – Single Vision Reading or Distance Lenses
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Issue: Difficulty focusing on close objects, often requiring reading materials to be held farther away for clarity.
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Cause: As the eye’s natural lens loses flexibility with age, the ability to focus on near objects gradually declines.
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Correction:
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Single Vision Reading lenses (+ power) are commonly used to enhance near vision, improving clarity for reading and close-up tasks.
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However, for those with existing myopia, Single Vision Distance lenses (- power) are often required to maintain clear distance vision.
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Since presbyopia progresses over time, lens prescriptions may need adjustments as vision changes.
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Best for: Reading, using a smartphone, sewing, working on a computer, and other close-up activities.