Crossed Cylinder Calculator

Crossed Cylinder Calculator

⭐️4 / 5
Rating
🙌1
Ratings
📼1 sc
Content
📦w/o updates
Updates frequency
🗣❌ unsupported
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All Versions of Crossed Cylinder Calculator

1.12

January 18, 2022

Code update

1.11

September 21, 2018

update to swift code

1.1

August 26, 2015

Fixed axis calculations.

1.0

February 9, 2015

Price History of Crossed Cylinder Calculator

Description of Crossed Cylinder Calculator

Determine resultant lens over existing lens combined with over refraction. Makes contact lens fitting more accurate. Useful in refining high powered eyeglass prescriptions using over refraction. Quick and easy to use application determines resulting contact lens prescription or spectacle prescription using lens currently worn and over refraction data. Exact results or round to one quarter diopter.

Crossed Cylinder Calculator: FAQ

Is Crossed Cylinder Calculator compatible with the iPad?

Yes, Crossed Cylinder Calculator works on iPads.
The app was developed by Alta Vista LLC.
The minimum supported iOS version for the Crossed Cylinder Calculator app is iOS 9.0.
With an overall rating of 4.0 out of 5, Crossed Cylinder Calculator has some room for improvement but is not terrible.
The Crossed Cylinder Calculator App Relates To The Medical Genre.
The latest version of Crossed Cylinder Calculator is 1.12.
July 1, 2024 is the date of the latest Crossed Cylinder Calculator update.
Crossed Cylinder Calculator was introduced to the market on February 6, 2023.
Contains nothing objectionable, appropriate for all ages.
Crossed Cylinder Calculator can be used in English.
No, Crossed Cylinder Calculator is not featured on Apple Arcade.
No, Crossed Cylinder Calculator does not include options for in-app purchases.
Sorry, Crossed Cylinder Calculator is not specifically engineered for compatibility with Apple Vision Pro.

Screenshot of Crossed Cylinder Calculator

iphone
ipad

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Reviews of Crossed Cylinder Calculator

  • Axis error

    Past version
    This app has a drum system and is easy to use, I have found some glitches. Firstly, the axis drums have an erroneous axis of 169 which should be 160. Secondly, a negative axis appears. This is not a big problem in that by subtracting that number from 180 gives the correct axis. For example, if lens worn is +2.50-1.75x167 and the Over Refraction is Plano-0.25x30, the result is +2.50-1.75x-9. -9 is equivalent to x171.
    Update:
    Axis problem is fixed. Recommend increasing range of spheres to + / - 20D. Or having an optional window to type in the needed power.
    Typing in an axis may save time spinning the drum.
  • Axis incorrect

    I would gladly change my rating if this bug is fixed but I can’t find anywhere to contact the developer. It calculates axis wrong. If you enter +2.00-1.75x175 for glasses and over refract 0.00-0.50x90 the result it gives is +1.51-1.26x83 (it won’t round this result either), which is incorrect.
    I cannot currently recommend purchasing this app until the error is corrected.