Healthy Clinical Trial
Official title:
Study of the Choroidal and Retinal Thickness in Relation to Axial Length in Healthy Young Subjects With Swept-source Optical Coherence Tomography.
The aim of the study is the non-invasive morphological evaluation of the choroid and the retina in relation to the length of the eyeball in healthy, young man and women.
The choroid is responsible for the oxygen supply of the outer retina, hence many diseases
that affect the retina are originating from the choroid or at later stages influence the
choroid as well. The functional efficiency of the choroid in a healthy subject is important.
The thickness of the choroid is a marker for the extent of the vessels inside.
With optical coherence tomography (OCT) non-invasive and non-contact measurement of the
choroidal and retinal thickness is possible. Swept-source OCT is one the latest developments
of OCTs. Its increase wavelength allows deeper penetration than previous models and allows
high resolution imaging.
OCTs are FDA approved machines, they are not considered experimental. The swept-source OCT
machine (DRI OCT-1 Model Triton (plus), Topcon, Tokyo, Japan) used in the study is a CE
marked commercially available medical device.
The goal of the study is to evaluate the choroidal and the retinal morphology in relation to
the length of the eyeball (axial length - AL) in healthy, young adults.
There are several publications on this topic, most of them on asian populations.
In the study healthy, Caucasians in their twenties are recruited to minimize the aging effect
on choroidal thickness.
Following informed consent, demographics are recorded, refraction is taken, axial length is
measured with IOL Master 500 (Carl Zeiss AG, Germany) then OCT is performed.
Pupil dilation is not necessary. Images are stored digitally by abiding corresponding laws on
personal data protection. Results are processed with statistical analysis.
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