Opening the iTunes Store.If iTunes doesn’t open, click the iTunes icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To buy and download Opticalc Contact Lens Calculator by Optical Directions Consulting, get iTunes now.

Do you already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Opticalc Contact Lens Calculator

By Optical Directions Consulting

Open iTunes to buy and download apps.


Opticalc Toric Contact Lens Calculator will help you improve your fitting skills when prescribing soft contact lenses.

Given a patient's refraction and vertex distance, it will tell you their ocular refraction corrected for vertex distance.

It then provides a recommended spherical contact lens power based on the patient's spherocylindrical refraction.

If you have a mislocating toric contact lens, Opticalc can tell you by how much the lens is mislocating, and suggest a new lens to order.

Once you enter the power of the patient's contact lens and the spectacle over-refraction, Opticalc will tell you by how much the lens
is rotating, and recommend the correct lens power to order.

Opticalc allows you to work in varying precision in both power and axis, depending on the parameter availability of the lens you are working with.

Use Opticalc to minimise the number of reorders required for your toric patients, make your initial lens selection for your sperical
patients more accurate, or use it to confirm that the lenses provided from the lab are correct.

Features freeform script entry. For example, entering "50" will automatically convert to "+0.50", entering -650 will automatically convert to "-6.50". Cyl powers are assumed to be minus, for example, entering "75" into a cyl power will be converted to "-0.75".

Also includes an Apple Watch app as a free bonus. The Apple Watch app is a stand-alone mini-version of the topic calculator. Enter the scripts and perform the calculations all from your wrist!

Please note that some contact lens calculators give incorrect answers. Opticalc uses the same calculations as can be found on this web page: --- Unfortunately, this page seems to have now disappeared.

If you find any discrepancies, please contact me on

What's New in Version 1.9

- Apple Watch. Oh yeah! Toric contact lens calculations on your wrist!
- iPhone 6 and 6 Plus sizes supported. Keeping up with the times.

Also, did I mention that I've added an Apple Watch app? It uses the digital crown to enter the powers which is pretty cool. It also uses watchOS 2, so it can be used without your iPhone present.


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
Opticalc Contact Lens Calculator
View in iTunes
Offers Apple Watch App for iPhone
  • SR 14.99
  • Category: Medical
  • Updated:
  • Version: 1.9
  • Size: 7.7 MB
  • Apple Watch: Yes
  • Language: English
  • Developer:

Compatibility: Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

We have not received enough ratings to display an average for the current version of this application.