# Eyelid

> Analyzes eye photographs to determine opened eye ratio and eyelid positions. (iPhone/iPad app by Medic Engineering K.K..)

- Source: https://appshunter.io/ios/app/eyelid/id964690025 (this page in markdown: same URL + `.md`)
- Developer: [Medic Engineering K.K.](https://appshunter.io/developer/917118875)
- Category: Health & Fitness, Lifestyle
- Price: $6.99
- Rating: 2.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 4 MB
- Languages: Japanese, American English
- Released: 2015-02-15
- Data updated: 2026-08-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/eyelid/id964690025/reviews.md

## What is Eyelid?

"Eyelid" provides the opened eye ratio using the eyebrow position, the upper-eyelid position and the lower-eyelid position.

【Usage】
Step 1. Prepare a photograph that the subject's eyes in the primary gaze position.
Step 2. Expand the eyebrow and eyelid.
Step 3. Set the red marks on the corneal limbus.
Step 4. Using ▲ / ▼ buttons, set the green marks on the eyebrow, the upper eyelid margin and the lower eyelid margin.
Step 5. Then showed the upper eyelid position (UEP), eyebrow position (EBP) and opened-eye ratio(OER).

【Topic】
- You can change the initial corneal size (transverse diameter and longitudinal diameter) .
- "Eyelid" has the camera with a sprit level. Therefore you can get a straight photograph.
- You can save the result as a JPEG format.

【Caution】
"Eyelid" is not the one to diagnose any illness.

## Key features

- Calculates opened eye ratio
- Measures eyebrow and eyelid positions
- Uses primary gaze photographs
- Allows manual marking of eye features
- Saves results as JPEG
- Includes a camera with a spirit level

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/eyelid/id964690025/reviews.md

### 2/5 — It doesn’t work

*2022-09-15*

I thought this app was to edit the size of your eyelids, but it does not and instructions are in Japanese

## Frequently asked questions about Eyelid

### What is Eyelid used for?

Eyelid is used to analyze photographs and calculate the opened eye ratio by measuring eyebrow position, upper eyelid position, and lower eyelid position. It helps in quantifying eye opening.

### How accurate is Eyelid?

The app's accuracy depends on the quality of the input photograph and the precise placement of the user-defined marks. It is not intended for diagnosing illnesses.

### Can Eyelid be used on any device?

Eyelid is supported on iPhone, iPad, and iPod devices. It requires iOS to function.

### What is the price of Eyelid?

Eyelid is a paid application and costs $6.99. There are no in-app purchases or subscriptions mentioned.

### Does Eyelid have ads?

No, Eyelid does not contain advertisements. It is a paid app without any ad support.

### How often is Eyelid updated?

The latest version, 4.1.2, was last updated on March 30, 2026. This indicates a potentially active development cycle, though specific update frequency is not detailed.

### What is the age rating for Eyelid?

Eyelid has an age rating of 4+, meaning it is suitable for users aged 4 and older.

### Can I save my Eyelid analysis results?

Yes, you can save the analysis results from Eyelid in JPEG format. This allows for easy sharing and record-keeping of your eye measurements.

## Version history (last 5 releases)

### 4.1.2 — 2026-03-30

- Optimized for iOS26.4 and iPadOS 26.4.
- Fixed a minor bug.

### 4.1.1 — 2026-03-27

- Optimized for iOS26.4 and iPadOS 26.4.

### 3.3.5 — 2025-11-19

- Optimized for iOS26.1.

### 3.3.4 — 2025-03-30

- Optimized for iOS18.3.

### 3.3.3 — 2024-11-14

- Optimized for iOS18.1.

## Apps similar to Eyelid

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Bynocs](https://appshunter.io/ios/app/bynocs/id1645833974) | — | Free | Health & Fitness |

## More apps by Medic Engineering K.K.

- [PostureCHECKER - S](https://appshunter.io/ios/app/posturechecker-s/id917118876)
- [Angle & Ratio](https://appshunter.io/ios/app/angle-and-ratio/id928803288)
- [TiltlessCamera](https://appshunter.io/ios/app/tiltlesscamera/id943744319)
- [Mamma Balance](https://appshunter.io/ios/app/mamma-balance/id979096929)
- [PostureCHEKCKER - plus](https://appshunter.io/ios/app/posturechekcker-plus/id984388779)

All apps by Medic Engineering K.K.: https://appshunter.io/developer/917118875

## Related topics

[eyelid](https://appshunter.io/ios/topics/eyelid)

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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 2026-08-15.*