Evaluating femtosecond laser assisted cataract and lens surgery

ISRCTN ISRCTN49681405
DOI https://doi.org/10.1186/ISRCTN49681405
Secondary identifying numbers Protocol version 4.3
Submission date
21/08/2012
Registration date
30/08/2012
Last edited
07/12/2017
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Eye Diseases
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Background and study aims
In femtosecond laser-assisted surgery a laser is used to create tiny incisions in the eye through which the old cloudy lens or cataract is removed and the new lens is implanted. The system has recently been introduced into the European Union and clinical use is limited, so we are evaluating the use of this system.

Who can participate?
Adults (aged over 16) undergoing refractive lens or cataract surgery.

What does the study involve?
Data on the results of your surgery will be analysed. We will also carry out some additional tests before and after surgery to determine the health of your eyes.

What are the possible benefits and risks of participating?
The additional tests are all non-contact, non-invasive and involve no discomfort. It is likely to take a maximum of 1 hour of extra time to perform these. There is no additional charge for you to be part of the study. The measurements performed will be providing additional information about the health of your eyes. However, overall it is unlikely that you will benefit personally from helping with this research project, but the results of the research should be of benefit to the large number of patients in the future.

Where is the study run from?
Moorfields Eye Hospital (UK)

When is the study starting and how long is it expected to run for?
August 2012 to August 2013

Who is funding the study?
Investigator initiated and funded (UK)

Who is the main contact?
Julian Stevens
info@julianstevens.co.uk

Contact information

Mr Julian Stevens
Scientific

81 Britannia Walk
London
N1 7RH
United Kingdom

Phone +44 20 7251 4835/4836
Email info@julianstevens.co.uk

Study information

Study designProspective observational study
Primary study designObservational
Secondary study designNon randomised controlled trial
Study setting(s)Hospital
Study typeTreatment
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific titleProspective observational study to evaluate femtosecond laser lens fragmentation, anterior capsulotomy cataract and lens extraction surgery
Study objectivesTo describe the safety of femtosecond laser lens fragmentation and anterior capsulotomy assisted cataract and lens surgery
Ethics approval(s)NRES Committee London - City Road & Hampstead, 30/01/2012, ref: 12/LO/0042
Health condition(s) or problem(s) studiedCataract, refractive error
InterventionThis is an observational study of surgery outcomes.
Intervention typeProcedure/Surgery
Primary outcome measureTo record any complications or adverse events
Secondary outcome measuresTo describe the ability of the intraocular femtosecond laser to successfully perform an anterior
capsulotomy and phakofragmentation during cataract/lens surgery.
Overall study start date28/08/2012
Completion date28/08/2013

Eligibility

Participant type(s)Patient
Age groupAdult
SexBoth
Target number of participants100
Key inclusion criteriaAny subject planned to undergo femtosecond laser assisted lens surgery. These subjects will already meet these criteria:
1. Subjects must be adults (>16 years), undergoing refractive lens or cataract surgery
2. Subjects must provide informed consent, have signed the written informed consent form, and been given a copy
3. Subjects must have a calculated average corneal power after of ≤ 50.00 D in the eye to be implanted
4. Subjects must have a pharmacologically dilated pupil >6.0 mm, in the eye to be implanted
5. The central anterior chamber depth must be >2.0 mm (Pentacam)
6. Subjects must be willing and able to return for scheduled follow up examinations for 3 months after surgery
Key exclusion criteria1. Subjects with subluxated crystalline lens
2. Subjects with endothelial dystrophy, guttata, in the eye to be implanted
3. Subjects with keratoconus (or keratoconus suspect) in the eye to be implanted or K>50 D
4. Subjects with distorted or unclear corneal mires on topography maps of the eye to be implanted
5. Subjects with a history of Herpes zoster or Herpes simplex keratitis.
6. The central anterior chamber depth <2.0 mm (Pentacam)
7. Tremor with head titubation
8. Subjects who are participating in any other ophthalmic drug or device clinical trial during the time of this clinical investigation
Date of first enrolment28/08/2012
Date of final enrolment28/08/2013

Locations

Countries of recruitment

  • England
  • United Kingdom

Study participating centre

81 Britannia Walk
London
N1 7RH
United Kingdom

Sponsor information

Moorfields Eye Hospital (UK)
Hospital/treatment centre

c/o Sue Lydeard
Research & Development
162 City Road
London
EC1V 2PD
England
United Kingdom

Website http://www.moorfields.nhs.uk/
ROR logo "ROR" https://ror.org/03tb37539

Funders

Funder type

Other

Investigator initiated and funded

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot provided at time of registration
Publication and dissemination planNot provided at time of registration
IPD sharing plan

Editorial Notes

07/12/2017: No publications found in PubMed, verifying study status with principal investigator.