Clinical Study - ES 900 - 2020-1

Sponsor
Haag-Streit AG (Industry)
Overall Status
Not yet recruiting
CT.gov ID
NCT05304182
Collaborator
Aravind Eye Hospitals, India (Other)
50
Enrollment
1
Location
2
Arms
21
Anticipated Duration (Months)
2.4
Patients Per Site Per Month

Study Details

Study Description

Brief Summary

EYESTAR 900 is a device developed by Haag-Streit which utilises 3D OCT for quantitative measurements of the geometry of the entire eye, including ocular biometry and corneal topography. It is the most recent in a series of successful biometry devices by Haag-Streit (HS Pachymeter, Lenstar LS 900, LS 900 T-cone and LS 900 APS) and also allows for advanced corneal tomography examinations. The EYESTAR 900 is CE marked.

These measurement results of this device are used for the planning of the medical treatment of patients. Depending on the application, the benefits of this device may include improved visual acuity (after cataract surgery), reduced risk of complications (after refractive surgery or implant of a phakic intraocular lens), early identification of pathological deformations of the cornea (keratoconus detection).

The primary objective of this clinical trial is to assess the clinical performance of the investigational device in dense cataracts. To that end, for each measurand, the in-vivo repeatability will be quantified, as well as limits of agreement and the mean measurement deviation, with respect to the current gold standard device.

As a secondary objective of the study, raw measurement data will be collected to allow for the improvement of existing algorithms, development of additional measurands and for retrospective analysis.

No diseases are studied.

Condition or DiseaseIntervention/TreatmentPhase
  • Device: EYESTAR 900
  • Device: LENSTAR LS 900
N/A

Detailed Description

The EYESTAR 900 is a non-contact device for measuring the human eye, consisting of a swept source OCT sub-unit (OCT: optical coherence tomography, a measurement method to acquire tomographic images by optical interferometry) and an imaging system sub-unit.

The OCT sub-unit performs a three-dimensional measurement of all refractive ocular structures in the anterior eye segment (curvatures and locations of the anterior corneal surface, posterior corneal surface, the anterior crystalline lens surface, posterior crystalline lens surface), as well as a one-dimensional measurement of axial eye length. It also generates cross-sectional images of the anterior eye section and the central retina. The measurement is implemented by scanning the eye with a low-power near-infrared laser beam and measuring the light which is back-reflected to the device.

The imaging system sub-unit is used to obtain photographic images of the eye. Based on these images, the keratometry (anterior corneal curvature of the steepest and flattest meridian), the white-to-white distance and the pupil diameter are measured. Additionally, these images can serve to document the locations of special landmarks on the eye, such as blood vessels. The imaging system sub-unit is based on conventional digital photography technology. Illumination for imaging is provided by infrared and white-light LEDs (light emitting diodes). Measurement of keratometry additionally requires measuring the distance to the eye using the OCT sub-unit.

The EYESTAR 900 is designed as standalone-device with integrated PC (personal computer) and display for device operation, measurement acquisition and processing, and presentation of the measurement results. After a patient is placed in front of the device and the chin rest is adjusted, the device can perform the remaining positioning procedures and acquire the measurements in a fully automated manner. Position information is derived from the OCT and digital camera system sub-units.

Both implemented measuring methods, optical coherence tomography (OCT), as well as digital photography are non-invasive, contactless methods. OCT uses a laser beam of λ=1060nm central wavelength and less than 2 mW optical power, which is focussed to a beam diameter of approximately 80µm at the anterior lens plane, and is continuously scanned in the lateral direction. Digital photography uses diffuse illumination of the eye by white-light LEDs (425nm ≤ λ ≤ 725nm) and infrared LEDs with central wavelength λ=850nm. All light sources emit levels that comply with ISO 15004-2 ("Ophthalmic Instruments - Fundamental requirements and test methods - Part 2: Light hazard protection"), under normal operating conditions as well as in case of a single fault condition.

The main application of this device is to acquire biometric measurements of cataractous eyes which are used to calculate suitable intraocular lens power and dimension.

The patient population must be capable of sitting up straight and keeping their head still and their eyes opened. They must be physically and mentally able to cooperate and mentally capable of following the examination. Patients must be at least 18 years old.

The target device user is an ophthalmologist or a trained specialist.

The investigational device EYESTAR 900 is developed and manufactured by HAAG-STREIT AG, Koeniz (Switzerland).

For the duration of the examination (approximately 1-2 minutes), the patient is in contact with the device at following applied parts:

  1. the chin rest shell (Edistir RK451 G naturally coated with HAERATEX Aqua 2K-structural coater BW89 10K RAL 9005);

  2. the forehead rest band (Saxamid 126-N001 uncoated PA6 white FK 6659 PA);

  3. (depending on the subject's requirements) the patient handles (aluminium EN AW-6060 (AlMgSi 0.5) colourless anodized class 20 with sealing chemically polished and sandblasted).

No other contact with body tissues or fluids takes place. A detailed assessment of biocompatibility according to EN ISO 10993 is given in the Biocompatibility Assessment Report. No critical biocompatibility issues were identified.

A detailed description of the make and use of EYESTAR 900 is given in the Investigator's Brochure (IB). The operators of the device will undergo training prior to the start of the study. The operators shall also be familiar with the use of optical biometry devices such as LENSTAR LS 900.

Study Design

Study Type:
Interventional
Anticipated Enrollment :
50 participants
Allocation:
Non-Randomized
Intervention Model:
Crossover Assignment
Intervention Model Description:
There are two identical arms in this study: pre-operative and post-operative. Every participant starts in the pre-operative arm and crosses over to the post-operative arm. During both arms, each study subject undergoes the experimental intervention and the control intervention. The study objective is to assess the clinical performance of the investigational device. This assessment is performed by a statistical analysis of the measurement results from the experimental intervention and the control intervention. The surgery is not a study intervention.There are two identical arms in this study: pre-operative and post-operative. Every participant starts in the pre-operative arm and crosses over to the post-operative arm. During both arms, each study subject undergoes the experimental intervention and the control intervention. The study objective is to assess the clinical performance of the investigational device. This assessment is performed by a statistical analysis of the measurement results from the experimental intervention and the control intervention. The surgery is not a study intervention.
Masking:
None (Open Label)
Primary Purpose:
Diagnostic
Official Title:
Clinical Study - ES 900 - 2020-1
Anticipated Study Start Date :
Apr 1, 2022
Anticipated Primary Completion Date :
Oct 30, 2023
Anticipated Study Completion Date :
Dec 31, 2023

Arms and Interventions

ArmIntervention/Treatment
Experimental: Pre-Op

The experimental intervention is non-invasive optical imaging, in particular digital photography and optical coherence tomography, conducted with the investigational and comparator device, for the purpose of measuring dimensions of the eye.

Device: EYESTAR 900
The EYESTAR 900 is a device developed by Haag-Streit which utilises 3D OCT for quantitative measurements of the geometry of the entire eye, including ocular biometry and corneal topography. It is the most recent in a series of successful biometry devices by Haag-Streit (HS Pachymeter, Lenstar LS 900, LS 900 T-cone and LS 900 APS) and also allows for advanced corneal tomography examinations.
Other Names:
  • Optical Biometer
  • Device: LENSTAR LS 900
    The LENSTAR LS 900 is a non-contact device for measurement of biometrical parameters of the eye, aimed to assist the calculation of intraocular lenses (IOLs) prior to intraocular lens implantation. The most common application is in preparation of cataract surgery. This device uses OLCR (optical low-coherence reflectometry), an interferometric method to measure intraocular axial distances. Furthermore, it uses digital photography of the anterior section of the eye to measure pupil size and location, as well as the white-to-white distance of the eye. The same photographic unit, in conjunction with a specific illumination pattern, is used to measure the corneal curvature - this measurement is known as 'keratometry', or, more specifically, 'automated keratometry'.
    Other Names:
  • Optical Biometer
  • Active Comparator: Post-Op

    The experimental intervention is non-invasive optical imaging, in particular digital photography and optical coherence tomography, conducted with the investigational and comparator device, for the purpose of measuring dimensions of the eye.

    Device: EYESTAR 900
    The EYESTAR 900 is a device developed by Haag-Streit which utilises 3D OCT for quantitative measurements of the geometry of the entire eye, including ocular biometry and corneal topography. It is the most recent in a series of successful biometry devices by Haag-Streit (HS Pachymeter, Lenstar LS 900, LS 900 T-cone and LS 900 APS) and also allows for advanced corneal tomography examinations.
    Other Names:
  • Optical Biometer
  • Device: LENSTAR LS 900
    The LENSTAR LS 900 is a non-contact device for measurement of biometrical parameters of the eye, aimed to assist the calculation of intraocular lenses (IOLs) prior to intraocular lens implantation. The most common application is in preparation of cataract surgery. This device uses OLCR (optical low-coherence reflectometry), an interferometric method to measure intraocular axial distances. Furthermore, it uses digital photography of the anterior section of the eye to measure pupil size and location, as well as the white-to-white distance of the eye. The same photographic unit, in conjunction with a specific illumination pattern, is used to measure the corneal curvature - this measurement is known as 'keratometry', or, more specifically, 'automated keratometry'.
    Other Names:
  • Optical Biometer
  • Outcome Measures

    Primary Outcome Measures

    1. Dense Cataract Performance [18 months]

      The primary outcome is the performance of the EYESTAR 900 in dense cataracts. Specifically, the highest grade of cataract at which complete measurements can reliably be performed and, consequently, the number of patients measured successfully.

    Secondary Outcome Measures

    1. Keratometry [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    2. Axial Length [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    3. White-to-White Imaging [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    4. Anterior Corneal Elevation [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    5. Anterior Corneal Axial Curvature [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    6. Anterior Corneal Tangential Curvature [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    7. Posterior Corneal Elevation [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    8. Posterior Corneal Axial Curvature [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    9. Posterior Corneal Tangential Curvature [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    10. Corneal Pachymetry [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    11. Simulated Anterior Keratometry [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    12. Simulated Posterior Keratometry [18 months]

      The limits of agreement and the confidence interval of difference in comparison with the LENSTAR 900.

    Eligibility Criteria

    Criteria

    Ages Eligible for Study:
    35 Years and Older
    Sexes Eligible for Study:
    All
    Accepts Healthy Volunteers:
    No
    Inclusion Criteria:

    All voluntary, consenting patients of more than 35 years who are seeking cataract surgery are eligible for participation, irrespective of age, gender or ethnicity.

    Exclusion Criteria:

    Patients who are ineligible for cataract surgery for any reason, such as aphakia, are excluded from participation. Patients with corneal astigmatism of more than 3.5 D of astigmatism.

    Patients with comorbidities, deformations, lesions and scarring of the cornea will be excluded from participation. This includes acute or a history of recurrent inflammation or infections of the eye, keratoconus, previous refractive surgeries, including PRK and LASIK, previous corneal surgeries and transplants and previous intraocular surgeries.

    Patients where the IOL could not be implanted in the capsular bag

    Contacts and Locations

    Locations

    SiteCityStateCountryPostal Code
    1Aravind Eye HospitalsChennaiTamil NaduIndia600077

    Sponsors and Collaborators

    • Haag-Streit AG
    • Aravind Eye Hospitals, India

    Investigators

    • Principal Investigator: Haripriya Aravind, MD, Aravind Eye Hospitals
    • Study Director: Thomas Beutler, Haag-Streit AG
    • Study Chair: Julian V Kool van Langenberghe, Haag-Streit AG

    Study Documents (Full-Text)

    None provided.

    More Information

    Publications

    None provided.
    Responsible Party:
    Haag-Streit AG
    ClinicalTrials.gov Identifier:
    NCT05304182
    Other Study ID Numbers:
    • 1023703
    First Posted:
    Mar 31, 2022
    Last Update Posted:
    Mar 31, 2022
    Last Verified:
    Mar 1, 2022
    Individual Participant Data (IPD) Sharing Statement:
    No
    Plan to Share IPD:
    No
    Studies a U.S. FDA-regulated Drug Product:
    No
    Studies a U.S. FDA-regulated Device Product:
    No
    Keywords provided by Haag-Streit AG
    Additional relevant MeSH terms:

    Study Results

    No Results Posted as of Mar 31, 2022