# Optics Clinical Calculator

> Clinical calculator for ophthalmology and optometry lens calculations. (iPhone/iPad app by Evan Schoenberg.)

- Source: https://appshunter.io/ios/app/optics-clinical-calculator/id301059660 (this page in markdown: same URL + `.md`)
- Developer: [Evan Schoenberg](https://appshunter.io/developer/289039917)
- Category: Medical
- Price: $4.99
- Rating: 4.00/5 from 3 App Store ratings · 20 written reviews indexed
- Age rating: 12+
- Requires: iOS 12.0 · 3 MB
- Languages: American English, Italian, European Portuguese
- Released: 2009-01-08
- Data updated: 2026-09-03
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/optics-clinical-calculator/id301059660/reviews.md

## What is Optics Clinical Calculator?

Optics Clinical Calculator is a vital tool for every general or refractive ophthalmologist, ophthalmology resident, optometrist, and optician.  With Optics, you’ll have streamlined, intuitive access to calculators used daily in prescribing lenses and understanding optics.

** Featured as a Top Eye App in Review of Optometry, March, 2012! **

Results are provided instantaneously, with no additional steps required, and explanations of the formulas and their application are just a tap away, perfect for learning and review.

Don't waste your money on a program which just does 1/10 of what Optics Clinical Calculator provides you! Optics has no equal on the App Store.

CALCULATORS

 • Base Curve
 • Convergence
 • Diopter to/from Radius (mm) Conversion
 • Diopters from Focal Distance
 • Intermediate and Near Vision Prescriptions from Standard Refraction
 • Lens Power in Oblique Meridians
 • Oblique Crossed Cylinders
 • Ocular Curve
 • Optical Center Decentration
 • Slab-Off calculator (Induced Prism)
 • Vertex Distance

FEATURES

 • Beautiful, fast interface evolved especially for Optics from the acclaimed MediMath Medical Calculator, including unique wheel-based diopter entry

 • Detailed explanations, including formulas and clinical notes, for each calculator (just tap the ‘i’) - perfect for review, cross-checking, and learning

 • Optics always returns to where you left off

 • Free upgrades for life, including requested additional calculators

CONTACT

Please let me know if there are other clinically relevant calculators you would like to see added in future free upgrades to Optics! I can’t respond to comments here in the App Store, so the best way to send a request is via email: evan@opticsapp.com. Please also contact me directly if you have any questions or concerns.

## Key features

- Lens prescribing calculators
- Optical calculation tools
- Intuitive interface
- Formula explanations
- Clinical notes
- Free upgrades

## Chart rankings

- #194 in Top Paid · Medical (US App Store)

## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/optics-clinical-calculator/id301059660/reviews.md

### 5/5 — Best

*2026-03-07*

Since Aug. 22, 2010 Thank You!

### 2/5 — iOS 18 breaks this app

*2024-09-17*

Just updated to iOS 18. The cross cylinder calculation no longer works. You cannot enter the axis number correctly for both current Rx and the cross cylinder amount.

### 5/5 — Very useful tool

*2013-05-11*

Quick and easy to use at work (I'm a student dispensing optician). Also wanted to suggest something to the developer and got a really prompt and honest reply.

### 4/5 — Great app but!!!!!

*2013-03-06*

Great general ophthalmic optical app. However I wish you were able to plug in any index of refraction for calculations. World these days revolves around more than just standard 1.53 shop index.

### 5/5 — Great optical app!

*2012-06-15*

Great app - a must have for any dispenser or technician.

### 5/5 — Great App

*2012-01-14*

Loved it, highly functional

### 5/5 — Thanks for the upgrade!

*2011-12-06*

Phenominal author support!
This program is a life saver in my practice.

### 4/5 — Good stuff

*2011-11-28*

Helps out on the job!

### 5/5 — MD

*2011-09-28*

Great app and very easy to navigate, I use it all the time for calculations.

### 5/5 — Very useful

*2010-11-17*

I use a this app regularly as an ophthalmologist for things like a slab off recommendation. It is easy to use and remembers your place so it is fast during the day.  

I was regularly confused that I was starting an American Red Cross app so I really appreciate the icon change! ;-)

## Frequently asked questions about Optics Clinical Calculator

### What is Optics Clinical Calculator used for?

Optics Clinical Calculator is designed for eye care professionals to quickly access and use essential tools for prescribing lenses and understanding optical principles in their daily practice.

### Who is the target audience for Optics Clinical Calculator?

The app is specifically designed for general or refractive ophthalmologists, ophthalmology residents, optometrists, and opticians.

### What kind of calculators are included in Optics Clinical Calculator?

It includes calculators for Base Curve, Convergence, Diopter to/from Radius Conversion, Intermediate and Near Vision Prescriptions, Lens Power in Oblique Meridians, Slab-Off, and Vertex Distance, among others.

### Does Optics Clinical Calculator offer explanations for its calculations?

Yes, the app provides detailed explanations, including formulas and clinical notes, for each calculator, accessible with a tap, which is beneficial for learning and review.

### How much does Optics Clinical Calculator cost?

Optics Clinical Calculator is a paid app, priced at $4.99. It offers free upgrades for life, including requested additional calculators.

### On which devices can I use Optics Clinical Calculator?

Optics Clinical Calculator is available for iPhone and iPod devices. It has an age rating of 12+.

### How often is Optics Clinical Calculator updated?

The app was last updated on September 10, 2024, with version 5.3. The developer offers free upgrades for life, indicating ongoing support and potential for new features.

### Does Optics Clinical Calculator have ads?

No, Optics Clinical Calculator does not contain advertisements. It is a paid application that focuses on providing a streamlined user experience without interruptions.

## Version history (last 5 releases)

### 5.3 — 2024-09-10

General interface updates for iOS 15.

### 5.2 — 2020-01-30

Added Dark Mode support

### 5.1 — 2019-10-06

• Updated for iOS 13+
 • Added memory for whether plus cyl or minus cyl was used last, defaulting to the last used cylinder sign

### 5.0 — 2016-07-11

• Updated for iOS 9+ and modern retina display iOS devices

### 4.0 — 2014-01-09

Updated for iOS 7

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## More apps by Evan Schoenberg

- [MediMath Medical Calculator](https://appshunter.io/ios/app/medimath-medical-calculator/id289039914)
- [Perfect OB Wheel](https://appshunter.io/ios/app/perfect-ob-wheel/id293656711)
- [ATP3 Lipids Cholesterol Management](https://appshunter.io/ios/app/atp3-lipids-cholesterol-management/id299487991)
- [Rowmote](https://appshunter.io/ios/app/rowmote/id300265786)
- [MedAbbreviations](https://appshunter.io/ios/app/medabbreviations/id303058840)

All apps by Evan Schoenberg: https://appshunter.io/developer/289039917

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*