Comparison

OptiExpert™ vs 9 Gaze

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OptiExpert™

This app assists eye care professionals in managing contact lens wearers. It offers tools for prescription calculation, axial length estimation, cost comparison, and grading contact lens complications with visual aids. It also supports patient education and secure record-keeping.

Highlights
  • Prescription Calculator
  • Axial Length Estimator
  • Cost Comparison Calculator
  • Efron Grading Scale
  • Patient Image Storage
  • Multilingual Support
Features
Read full description

OptiExpert™ is a free, multifunctional and multilingual app which has been designed to help eye care professionals deliver the best possible service to their patients who are contact lens wearers. Prescription Calculator Makes the fitting process for patients simpler and more efficient. Quickly calculate and evaluate myopic, hyperopic, astigmatic and presbyopic prescriptions, select lenses and save chair time. ToriTrack™ Accurately calculates rotation-adjusted next-lens options and provides a reliable, precise recommendation so you can fine-tune/refine each toric fit. Designed to be simple to use, it makes over-refractions easy, helping you quickly get patients into their optimal toric lens. Axial Length Estimator Can be used to help eye care professionals better understand the significance of ocular axial lengths. Cost Comparison Calculator This function clearly shows your patients the cost of upgrading their lenses. By simply selecting details from the dropdowns and adding the retail value of the products being compared by the eye care professionals, the calculator will demonstrate the difference in cost per wear, cost per week and cost per month. Efron Grading Scale Provides a simple reference for grading the severity of contact lens complications; aiding tissue change comparisons and helping patients understand the importance of their practitioner’s recommendations. Based on the traditional ‘Efron Grading Scale’, the app converts this information into an easy-to-use digital tool, which is always on-hand. It allows practitioners to grade patients against 16 sets of images and covers the key anterior ocular complications of contact lens wear. The conditions are illustrated in five stages of increasing severity from 0–4, with traffic light colour banding from green (normal) to red (severe), providing a straightforward and efficient aid for the optical professional. Available in 17 languages, OptiExpert™ enables practitioners to control what is shown to the patient so they only see the conditions and severity that is relevant to them. A visual representation of their condition also helps patients understand the importance of their ECP’s recommendations, such as upgrading to a silicone hydrogel contact lens to improve clinical signs of hypoxia or the importance of adhering to contact lens wearing schedules. Additional benefits of the app include the ability to securely store images of the patient’s eye condition - facilitating easy comparison to other images on the scale to aid accurate grading. Practitioners are able to add their own comments following each patient evaluation, allowing a comprehensive record to be compiled of each individual’s condition and any treatment prescribed. OptiExpert™ is an educational tool. Eye care professionals may choose to use the app as part of their patient evaluation. OptiExpert™ is not intended as and does not constitute medical or optometric advice and eye care professionals should rely on their own expertise.

About

9 Gaze

This app helps document eye motility and strabismus in nine cardinal positions. It offers an on-screen guide for consistent eye positioning and automatically creates composite images for easy exporting. Users can add strabismus measurements and email or save images for medical records.

Highlights
  • Document eye motility and strabismus
  • On-screen guide for eye positioning
  • Automatic composite image creation
  • Add strabismus measurements
  • Selfie or standard mode
  • Email or save images
Features
Read full description

9 Gaze is an easy, quick, and efficient way to document eye motility and strabismus in the nine cardinal positions of gaze (and 2 head tilts, abnormal head position). The app provides an on-screen guide for eye positioning to assist with image consistency through all photographs. 9Gaze app automatically creates a composite image of the photographs for easy exporting. Designed for a touch-screen interface, you can also quickly add strabismus measurements to your photograph or as a stand-alone image. You can email the images to yourself for importing into your record or save to your camera roll. Features: - Selfie mode or standard mode - On-screen guide for placement of eyes (with autocrop) - Automatic creation of the composite image of all 9(+2) positions of gaze - Ability to skip gaze directions (or skip to end) - Re-take any picture - Turn flash on or off - Landscape and portrait modes - Ability to document name, ID number, date of birth, and date of picture Save time with 9 Gaze! Disclaimer: No information or photos are ever saved within the app. It is the user's responsibility to protect any and all protected health information (PHI) obtained by the user. If you choose to save images to camera roll, it is highly suggested to encrypt your phone and turn off iCloud photo backup. When emailing photos, please make sure your email is HIPAA secure. This is not a medical device. Do not use app to diagnose or treat any medical conditions.

Screenshots

OptiExpert™3 screens
9 Gaze4 screens

Verdict

The call

The clearest difference is review sentiment: 9 Gaze at 86% against OptiExpert™'s 22%. 9 Gaze also leads on rating (4.6 vs 4.0) and ratings volume (22 vs 7). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

9 Gaze holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 7 and 22 respectively. Written reviews point the same way: 22% of OptiExpert™'s written reviews are positive against 86% of 9 Gaze's.

UpkeepUpdate frequency

OptiExpert™ ships an update every 3 months, 9 Gaze every 2 months. The most recent releases landed on September 13, 2026 and August 27, 2026 respectively.

Scorecard4 real differences · 6 level
OptiExpert™ versus 9 Gaze: the parameters behind the verdict, then further details
ParameterOptiExpert™9 Gaze
PriceFreeFree
Rating4.0 (7 ratings)4.6 (22 ratings) — better
Positive reviews22.2% of reviews85.7% of reviews — better
Number of ratings722 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size63 MB36 MB
Age rating17+12+
DeveloperCooperVision, Inc.See Vision, LLC

Customer experience

OptiExpert™

All ratings7 ratings
Positive71.4%
Neutral14.3%
Negative14.3%
Written reviews9 reviews
Positive22.2%
Neutral55.6%
Negative22.2%

9 Gaze

All ratings22 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews14 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

In-app purchases

None

OptiExpert™

No in-app purchases

None

9 Gaze

No in-app purchases

Questions

Is OptiExpert™ free?
OptiExpert™ is free to download, with no in-app purchases.
Is 9 Gaze free?
9 Gaze is free to download, with no in-app purchases.
Which has better reviews, OptiExpert™ or 9 Gaze?
9 Gaze is rated higher. OptiExpert™ averages 4.0 out of 5 from 7 ratings, while 9 Gaze averages 4.6 from 22 ratings.
Do OptiExpert™ or 9 Gaze have ads?
Neither OptiExpert™ nor 9 Gaze shows ads.
Which is updated more often, OptiExpert™ or 9 Gaze?
OptiExpert™ ships an update every 3 months, and 9 Gaze every 2 months. Most recently, OptiExpert™ was updated on September 13, 2026 and 9 Gaze on August 27, 2026.

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