NCT04977115 is a NA clinical trial of Intraocular caliper-assisted capsulotomy in Cataract Extraction, sponsored by Zhongshan Ophthalmic Center, Sun Yat-sen University.

Who is sponsoring NCT04977115?

NCT04977115 is sponsored by Zhongshan Ophthalmic Center, Sun Yat-sen University.

What drugs are being tested in NCT04977115?

Interventions in NCT04977115: Intraocular caliper-assisted capsulotomy, Verion navigation system-assisted capsulotomy.

What condition does NCT04977115 study?

NCT04977115 studies Cataract Extraction.

Is NCT04977115 still recruiting?

NCT04977115 is currently status unknown. Last updated 26 July 2021.

Last reviewed 2021-07-26 · How we verify

NCT04977115

Name: Drug Landscape Pharmaceutical Database
Creator: Drug Landscape
Published: 2026-01-01
License: https://creativecommons.org/licenses/by/4.0/

Clinical Evaluation of Intraocular Caliper-assisted Capsulotomy for Age-related Cataract

Status unknown NA Last updated 26 July 2021

What this trial tests

NA trial testing Intraocular caliper-assisted capsulotomy in Cataract Extraction in 156 participants. Status unknown.

Timeline

26 July 2021

Primary endpoint
28 February 2022

30 April 2022

Quick facts

Lead sponsor	Zhongshan Ophthalmic Center, Sun Yat-sen University
Phase	NA
Status	Status unknown
Study type	INTERVENTIONAL
Allocation	randomized
Design	parallel
Masking	double
Primary purpose	other
Enrollment	156
Start date	26 July 2021
Primary completion	28 February 2022
Estimated completion	30 April 2022
Sites	1 location across China

Drugs / interventions tested

Intraocular caliper-assisted capsulotomy
Verion navigation system-assisted capsulotomy

Conditions studied

Cataract Extraction — all drugs for Cataract Extraction →

Sponsor

Zhongshan Ophthalmic Center, Sun Yat-sen University

Who can join

Adults 55 to 80, any sex, with Cataract Extraction. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

The purpose of this study is to compare the accuracy of capsulotomy assisted by intraocular caliper and Verion navigation system in phacoemulsification surgery and postoperative visual quality of patients.

Publications & conference data

1 peer-reviewed publication reference this trial (live from Europe PMC):

Manual Marking Guidance vs Digital Guidance System-Assisted Capsulorhexis in Phacoemulsification: A Noninferiority Randomized Clinical Trial.
Chen X, Liu Z, Jin L, Zheng Y, et al · · 2026 · PMID 41231447 · DOI 10.1001/jamaophthalmol.2025.4448

Verify or expand the search:

Other trials of Intraocular caliper-assisted capsulotomy

Trials testing the same drug.

NCT04977102 — A Randomized Study of Intraocular Caliper-assisted Capsulotomy for Age-related Cataract Patients With Corneal Limbus Opa · NA · unknown

Other recruiting trials for Cataract Extraction

Currently open trials in the same condition.

NCT07305987 — PRO-232 in Patients Subjected to Cataract Surgery · Phase 3 · recruiting

Other Zhongshan Ophthalmic Center, Sun Yat-sen University trials

Trials by the same sponsor.

NCT07524725 — Effect of Behavioral Intervention (Baduanjin Alone or Laughter Exercise Plus Artificial Tears) Versus Artificial Tear on · NA · not yet recruiting
NCT07096622 — Efficacy of Visual and Perceptual Training on Visual Function for Operative Congenital Ectopia Lentis Children · NA · not yet recruiting
NCT06098677 — Effect of Carotenoids Supplementation on Visual Function in Chinese Subjects · NA · not yet recruiting
NCT07512115 — The Impact of 'A Miss Is as Good as a Mile': Is Compensation Necessary for Minimal Ocular Deviation in Myopic Laser Surg · NA · not yet recruiting
NCT07512089 — Comparison of PRESBYOND Laser Blended Vision and Conventional Monovision LASIK in Individuals With Presbyopia: A Randomi · NA · not yet recruiting

Verify against primary sources

ClinicalTrials.gov — authoritative US registry record
WHO ICTRP — international registry index
EU Clinical Trials Register
Sponsor press releases (Google)

Data sources for this page

Trial protocol + status: ClinicalTrials.gov NCT04977115 (US National Library of Medicine, public domain)
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by Zhongshan Ophthalmic Center, Sun Yat-sen University
Last refreshed: 26 July 2021

Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT04977115.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing