Cataract Senile
Conditions
Keywords
ss-OCT, OLCR, biometry
Brief summary
Achieving high accuracy and precision in ocular biometry has become primordial for cataract surgery, due to the shift of cataract surgery from a rehabilitation procedure to a refractive one. Aim of this study is to determine the repeatability of ocular biometric parameters obtained using three biometry devices, two ss-OCT biometers and an OLCR device.
Detailed description
Accurate and repeatable biometric measurements are essential in providing an optimal refractive outcome. ss-OCT biometry uses a tunable wavelength laser source to scan the eye, this technology showing its superiority through better signal-to-noise ratio, the wavelength light source being projected into the eye, one at a time; thus improving tissue penetration. This a prospective observational study that would include patients which attended pre-surgical examination. A written informed consent will be obtained from each patient. Only one eye from each patient will be included in the study. All patients included in the study will undergo biometric measurements in a random fashion with the three devices (IOLMaster 700, Lenstar LS 700 and Anterion Heildelberg). Each patient will be measured three times with each device and between the measurements they will be asked to blink or keep their eyes closed for tear film recovery and to avoid fatigue. Scans that pass the quality requirement of each device will be taken for analysis.
Interventions
DEVICEbiometric measurement IOLMaster 700
Three biometric measurements will be performed with 3 devices for all the patients included
DEVICEbiometric measurement Lenstar LS 700
Three biometric measurements will be performed with 3 devices for all the patients included
DEVICEbiometric measurement Anterion Heildelberg
Three biometric measurements will be performed with 3 devices for all the patients included
Sponsors
Prim. Prof. Dr. Oliver Findl, MBA
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
21 Years to 100 Years
Healthy volunteers
No
Inclusion criteria
* 40 years old or above * age-related cataract
Exclusion criteria
* patients with dense cataract or corneal pathology that would significantly influence biometric measurements * nystagmus or pathologies that would affect patient fixation * pregnancy- for women in reproductive age a pregnancy test will be performed.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Evaluation of repeatability between two ss-OCT and one OLCR biometry device | 8 months | Repeatability coefficient (within subject standard deviation - SD) and coefficient of variation between two ss-OCT and the OLCR biometry device will be calculated for all the parameters (axial length, keratometry, anterior chamber depth, lens thickness) |
Countries
Austria
Outcome results
None listed