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 toric 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:
http://www.vco.org.au/misc/ophthalmicalc/OphthalmiCalc.html --- Unfortunately, this page seems to have now disappeared.
- Fixed a bug in the display of the Contact Lens + Over-Refraction apparent rotation which was showing the wrong way. I blame the coreolis force being backwards in the Northern Hemisphere.
- Fixed a bug where the calculations didn't update immediately after entering a new subjective refraction. No excuse.
- Fixed a bug where the Watch app would crash upon start. I blame watchOS 5 for changing something, and Apple for making it so hard to test Apple Watch apps.
- Watch app can now run independently of iPhone app.
- Dark Mode support on iOS 13. Looks really good on this app!
Ratings and Reviews
Watch app not working
Watch app opening then goes black. Tried to contact developer but gives me an error. Will update stars if this gets fixed. Purchased Burke to support developer but not happy when I got to use on my watch
Developer Response ,
Sorry, I'm aware of that issue and will try to fix it when I can.
Clean and nice
Fast calculation and saves time.
Two thumbs up
Perfect contact lens app for getting a starting point on a new contact lens fit. Developer was very easy to contact and answered all my questions in a timely manner. Highly recommend.
No Details Provided
The developer will be required to provide privacy details when they submit their next app update.
- Rob McQualter
- 27.8 MB
- Requires iOS 9.3 or later.
- Requires iPadOS 9.3 or later.
- iPod touch
- Requires iOS 9.3 or later.
- Requires macOS 11.0 or later and a Mac with Apple M1 chip.
- Age Rating
- © 2009 Optical Directions Consulting
With Family Sharing set up, up to six family members can use this app.