CYPRESS Efficacy and Safety Study Extension
Public ClinicalTrials.gov record NCT04947735. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Control of Myopia Using Peripheral Diffusion Lenses: Efficacy and Safety Study Extension
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This is an open-label, controlled, multisite, two-arm parallel group clinical trial of 36-month duration to evaluate the continued safety and efficacy of SightGlass Vision Diffusion Optics Technology (DOT) Spectacles in reducing the progression of juvenile myopia.
Study identification
- NCT ID
- NCT04947735
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 200 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 6 Years to 17 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 19, 2021 (Actual)
- Primary completion
- Oct 31, 2026 (Estimated)
- Completion
- Dec 31, 2026 (Estimated)
- Last update posted
- May 5, 2026
2021 – 2026
United States locations
- U.S. sites
- 11
- U.S. states
- 10
- U.S. cities
- 11
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Golden Optometric Group | Whittier | California | 90606 | — |
| Omega Vision Center, PA | Longwood | Florida | 32779 | — |
| Kannarr Eye Care | Pittsburg | Kansas | 66762 | — |
| Haik Humble | West Monroe | Louisiana | 71291 | — |
| Advanced Eyecare PC | Raytown | Missouri | 64133 | — |
| SUNY School of Optometry | New York | New York | 10036 | — |
| Sacco Eye Group | Vestal | New York | 13850 | — |
| Dunes Eye Consultants | Dakota Dunes | South Dakota | 57049 | — |
| Total Eye Care | Memphis | Tennessee | 38119 | — |
| Dr. Bridgitte Shen Lee (PI) | Houston | Texas | 77205 | — |
| William J Bogus, OD, FAAO | Salt Lake City | Utah | 84106 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 1 non-U.S. site.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04947735, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted May 5, 2026 · Synced Oct 21, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT04947735 live on ClinicalTrials.gov.