# LRI Calc — Limbal Relaxing Incisions Calc

> Pre-operative planning tool for Limbal Relaxing Incisions to correct astigmatism. (iPhone/iPad app by Evandro Souza.)

- Source: https://appshunter.io/ios/app/lri-calc/id393310977 (this page in markdown: same URL + `.md`)
- Developer: [Evandro Souza](https://appshunter.io/developer/369811735)
- Category: Medical, Utilities
- Price: $1.99
- Rating: 4.50/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 17+
- Requires: iOS 12.0 · 17 MB
- Languages: American English
- Released: 2010-09-25
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/lri-calc/id393310977/reviews.md

## What is LRI Calc?

LRI CALC is an iPhone application to assist you in pre-operative planning for Limbal Relaxing Incisions (LRI) to correct the astigmatism.

The usage is very simple: just press the 'PATIENT' button and provide the requested patient data, choose the nomogram and press ’DONE’ button.

The calculator will suggest the incisions as the nomogram chosen in attempt to correct as much as possible without over correct the astigmatism.

***** This application is for reference and simulation only *****

## Key features

- Pre-operative planning for LRI
- Astigmatism correction
- Patient data input
- Nomogram selection
- Incision suggestion calculator
- Simulation tool

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/lri-calc/id393310977/reviews.md

### 4/5 — Adequate

*2021-01-13*

They need to fix the white font on white background issue on the induce astigmatism and incision location sections.

### 5/5 — Excellent!!

*2012-05-26*

Very easy to use!
With the most common nomograms, but with other names.

## Frequently asked questions about LRI Calc

### What is LRI Calc used for?

LRI Calc is used for pre-operative planning of Limbal Relaxing Incisions (LRI) to assist in correcting astigmatism. It helps suggest incision plans based on patient data and chosen nomograms.

### How does LRI Calc help correct astigmatism?

By inputting patient data and selecting a nomogram, LRI Calc provides suggested incision plans. These suggestions aim to correct astigmatism as much as possible without overcorrection.

### Is LRI Calc free to use?

No, LRI Calc is a paid application. It is available for a one-time purchase price of $1.99.

### What devices does LRI Calc support?

LRI Calc is designed for Apple devices and supports iPhones and iPods. It is not currently available for Android or other platforms.

### How often is LRI Calc updated?

The latest version of LRI Calc is 3.0.2, which was last updated on February 12, 2021. Users can expect updates to maintain compatibility and potentially add new features.

### What is the age rating for LRI Calc?

LRI Calc has an age rating of 17+. This is common for medical applications that require professional understanding and context.

### Does LRI Calc have ads?

No, LRI Calc does not contain advertisements. As a paid application, it provides an ad-free experience for users.

### What is the user feedback on LRI Calc?

LRI Calc has received positive feedback, holding a rating of 4.5 stars from 2 ratings. This suggests a high level of user satisfaction with its functionality.

## Version history (last 5 releases)

### 3.0.2 — 2021-02-12

Resolved the problem of not returning to the main screen on some devices.

### 3.0.1 — 2021-02-09

Solved the problem of labels in the same color as the background on some devices.

### 3.0 — 2020-05-29

Completely redesigned application;
Surgeon, patient and additional information fields;
Data is not lost when exiting the application;
Possibility to use mm or diopters;
Clean and pleasant interface;
iOS 13 Compatibility.
Button to save or share the results.

### 2.0 — 2015-03-15

iOS 8 compatibility.
Graphical improvement
Bugs fixed

### 1.1 — 2010-11-19

Minor bugs fixed.
Adjustments in the nomograms and information screens.

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## More apps by Evandro Souza

- [Eye Tools](https://appshunter.io/ios/app/eye-tools/id369811728)
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- [Best Deal - The easiest and fastest way to compare prices.](https://appshunter.io/ios/app/best-deal-the-easiest-and-fastest-way-to-compare-prices/id608113768)

All apps by Evandro Souza: https://appshunter.io/developer/369811735

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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 2026-06-10.*