Version history
Opticalc Contact Lens Calc
57
ASO score
Text
85/100
Reviews
0/100
Graphic
60/100
Other
0/100
App Rating
3.5
Votes
10
App Age
16y 9m
Last Update
May 30, 2024
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Rating
|
3.45
|
4.6
|
-25%
|
|
Number of Ratings (Voted)
|
10
|
65.9K
|
-100%
|
|
App Age
|
16y 9m
|
9y 3m
|
+80%
|
|
Price
|
$4
|
$2
|
+143%
|
|
In-app Purchases Price
|
$0
|
$37
|
|
|
Update Frequency
|
572d
|
138d
|
+313%
|
|
Title Length
|
26
|
25
|
+4%
|
|
Subtitle Length
|
22
|
25
|
-12%
|
|
Description Length
|
1 786
|
2 678
|
-33%
|
|
Number of Screenshots
|
1053
|
1355
|
-22
%
|
|
Size
|
24MB
|
278MB
|
-91
%
|
Category Ranking in United States
7 days
Last 7 days
Last 30 days
Last 90 days
Last 180 days
Last year
| Top | Dec 15, 2025 | Dec 22, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 15, 2025 | Dec 22, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 15, 2025 | Dec 22, 2025 |
|---|---|---|
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No results were found!
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| Top | Dec 15, 2025 | Dec 22, 2025 |
|---|---|---|
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No results were found!
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Ranking Keywords in United States
| Keywords | App Rank |
|---|
Analyze this and other apps using Asolytics tools
Text ASO
Title
(
Characters:
26
of 30
)
Opticalc Contact Lens Calc
Subtitle
(
Characters:
22
of 30
)
Toric Lens Mislocation
Description
(
Characters:
1786
of 4000
)
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.}
Read more
Other
Additional Information
| Rating: | |
| Voted: | 10 |
| App Store Link: | |
| Price: | 3.99 $ |
| Website: | |
| Email: | - |
| Privacy Policy: | |
| Categories: | Medical, Productivity |
| Size: | 24MB |
| App Age: | 16 years 9 months |
| Release Date: | Mar 27, 2009 |
| Last Update: | May 30, 2024 |
| Version: | 2.7 |
Version history
2.7
May 30, 2024
Fixed vertex distance not updating correctly, and moved it to the main screen rather than settings.
2.6
Dec 06, 2022
- Fixed the display of the rotation for contact lens over-refraction + nominal contact lens power. The "lens to order" was correctly displayed.
- Added a "Settings" and "Reset" button to the Apple Watch, since these functions were previously hidden in a force-press menu that is no longer supported on newer watches.