Dual Strength Bifocal- The Card Shark

(9 reviews) Write a Review
1.10 Ounces
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Discover the Card Shark Dual Strength Bifocal, the ultimate solution for individuals seeking versatile reading glasses for up-close tasks and computer use. With innovative Dual Strength Bifocal lenses offering power on both the top and bottom, enjoy unparalleled flexibility and clarity without compromising your vision.

Say goodbye to the hassle of switching between multiple pairs of glasses or settling for subpar vision. Our Dual Strength Bifocal features top lens with a weaker power for computer use and a bottom lens for reading power. Crafted with fine optical CR39 material and a high-quality TR90 plastic frame, these bifocals offer durability, clarity, and style for your everyday needs.

Large size is 5-2/3" x 1-1/2" for wide faces or mm frame optical measurements 56-17-145


Medium size is “5-1/3 x 1-1/2"  for average size faces or mm optical measurement 53-17-140


Please note: The lenses are custom made per order, so this item can take up to 5 days for us to ship out to you. Keep this in mind when selecting more expensive rush shipping options. We will still ship it via Priority or Express, but it won't leave our facility for at least a few business days.



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9 Reviews Write a Review

  • 5

    Posted by shelby lacouture on 5th Jul 2024


    I’m an electrical engineer and spend much of my time switching my gaze between a large monitor and reading material on my desk, and since I am far-sighted, this means switching between two different strength reading glasses. For quite some time now I’ve looked for readers with different magnifications to no avail. I’ve tried “progressives” which have a very small field of view (an extreme case of foveated view), and can not tolerate this. I don’t remember how I stumbled on these card sharks, but I’m very glad I did; these are worth their weight in gold to me; no more swapping glasses repeatedly. Quality is fantastic as well. Good job Debbie Burke!!

  • 4

    Posted by Ralph Blair on 24th Apr 2024

    Dual Strength Bifocal

    I spend a lot of time on computer while doing paperwork, Dual strength bifocals allowed me to stop having to switch glasses each time i went from cpu screen to paper documents. Great product that met my needs.

  • 5

    Posted by Edward Luczak on 13th Mar 2024

    Perfect for my needs

    I am constantly struggling with the need for 2 different OTC readers. One for close up and one for my computer. My optometrist could only supply these with plain glass at the top and the 2 reading powers sharing the bottom half of the frame. Gave me headaches as the area I had to focus on was very thin. After much searching I found these. The Card Shark Dual Strength Bifocal is perfect. Top half is for reading my computer, the bottom half is for papers or phone or similar. So glad I found them. No more carrying around multiple reading glasses. the lens is of good quality, the frames are solid and the wider frame fits me head perfectly not leaaving me with imprints along my temple. These are a must have is you want simples dual power readers.