The Effect of Eyedrop Size on Pupillary Dilation Using the Nanodropper Bottle Adapter

November 12, 2024 updated by: Sutter Health

The average drop size produced by standard eyedrop bottle exceeds the maximal capacity that the human eye are absorb topically. This excess leads to medication waste, increased costs, and greater risk of side effects.

The Nanodropper is a commercially available, FDA listed eyedrop bottle adapter that delivers a smaller drop size. The investigators hypothesize the Nanodropper is noninferior to the standard eye drop bottle for pupil dilation.

In this study, participants have one eye randomly chosen to be dilated with the Nanodropper and the fellow eye dilated with the standard bottle with a 50/50 mixture of tropicamide 1% and phenylephrine 2.5%. Pupil size before and after 30 minutes of dilation are measured with a pupillometer and compared between fellow eyes to see if there is a difference.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Ophthalmic medications are available in eyedrop bottles that produce on average a drop size of about 40 uL, while the human eye can only hold about 7-10uL. This excess leads to medication waste, increased costs, and greater risk of side effects.

The Nanodropper is a commercially available, FDA listed (class 1 medical device, 510(k) exempt) eyedrop bottle adapter that delivers a smaller drop size of 10 uL. The investigators hypothesize the Nanodropper is noninferior to the standard eye drop bottle for pupil dilation.

This is a prospective comparative matched pairs study of adults scheduled for routine bilateral eye dilation. Exclusion criteria includes anisocoria and medications affecting pupil size. One eye is randomly dilated with the Nanodropper and the fellow eye dilated with the standard bottle with a 50/50 mixture of tropicamide 1% and phenylephrine 2.5%. Pupil size before and after 30 minutes of dilation are measured with a pupillometer and compared between fellow eyes within the same subject with a noninferiority margin of 0.5mm.

Study Type

Interventional

Enrollment (Actual)

54

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • San Francisco, California, United States, 94012
        • Lions Eye Clinic

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • age >18 years old
  • scheduled for routine bilateral eye dilation

Exclusion Criteria:

  • narrow angles
  • allergies to phenylephrine or tropicamide
  • concurrent use of any mydriatic agents (e.g., atropine, cyclopentolate, brimonidine)
  • baseline anisocoria (>1 mm)
  • traumatic pupil,
  • surgical pupil
  • unilateral pseudoexfoliation.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Eye dilated with the nanodropper
For each participant, one eye (left or right) is randomly selected to be dilated with the Nanodropper.
Device: Nanodropper
One eye is randomly selected to be dilated with the nanodropper
Active Comparator: Eye dilated with the standard bottle
Fellow eye is dilated with the standard eye drop bottle
Device: Standard eye drop bottle
eye is dilated with the standard eye drop bottle

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Pupil size (diameter)
Time Frame: 30 minutes after dilation
Pupil diameter (mm)
30 minutes after dilation

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sutter Health

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 4, 2022

Primary Completion (Actual)

January 31, 2022

Study Completion (Actual)

January 31, 2022

Study Registration Dates

First Submitted

November 7, 2024

First Submitted That Met QC Criteria

November 12, 2024

First Posted (Actual)

November 15, 2024

Study Record Updates

Last Update Posted (Actual)

November 15, 2024

Last Update Submitted That Met QC Criteria

November 12, 2024

Last Verified

November 1, 2024

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 1826733-1

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

Yes

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Medication Delivery

Clinical Trials on Nanodropper

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Spain

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe