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$Subjective Refraction Test Using a Smartphone for Vision Screening$

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Digital Health Support for Cataract Surgery With the Sharp Health Companion CareKit App: Randomized Controlled Trial.

Tommy S Korn¹, Armand Assissini¹, Lesli Ann Slater²

¹Department of Ophthalmology, Sharp HealthCare, Sharp Rees-Stealy Medical Group, San Diego, CA, United States.

JMIR Mhealth and Uhealth

|April 29, 2026

Summary

The Sharp Health Companion app reduced same-day cataract surgery delays and improved patient experience. Mobile health interventions show promise for enhancing perioperative care, even for older adults.

Keywords:

CareKit cataract surgery digital health mHealth medication adherence mobile health older adults patient education perioperative care surgical outcomes telemedicine

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Area of Science:

Ophthalmology
Digital Health
Geriatric Medicine

Background:

Cataract surgery is a common global procedure essential for vision restoration.
Barriers like the COVID-19 pandemic and an aging population impact timely access to surgery.
Poor adherence to preoperative and postoperative instructions leads to cancellations and complications.

Purpose of the Study:

To assess the effectiveness of the Sharp Health Companion smartphone app versus printed instructions for cataract surgery patients.
To evaluate the app's impact on medication adherence, surgery delays/cancellations, visual outcomes, and patient experience.
To determine the app's utility in older adults undergoing cataract surgery.

Main Methods:

A randomized controlled trial involving 200 patients (aged 41-87, 73% ≥65 years) undergoing cataract surgery.
Participants were assigned to either printed instructions with phone reminders or the Sharp Health Companion app.
Data collected included medication adherence, surgery delays/cancellations, visual acuity, and patient satisfaction.

Main Results:

App users experienced significantly fewer same-day surgery delays (1% vs. 10%; P=.01).
Patient-reported preparedness was high and comparable between groups.
Objective antibiotic adherence favored app users, while self-reported adherence favored printed instructions.

Conclusions:

The Sharp Health Companion app reduced surgery delays and enhanced patient experience in older adults undergoing cataract surgery.
Mobile health interventions can improve perioperative care efficiency.
The app demonstrates potential for improving adherence and outcomes in diverse patient populations.