259 / 374
SOCT User Manual Version 10.0 rev. A
18 BIOMETRY OCT
NOTE: Biometry OCT is optional software modules. If you do not have this feature and want to
purchase it, contact Optopol’s local distributor.
The SOCT software with optional OCT Biometry function is intended for biometric
measurements and visualization of ocular structures and performing IOL power calculations
based on the patient’s biometric data and a selection of recognized IOL calculation formulas.
The software measures the following parameters: Axial Length (AL), Central Corneal Thickness
(CCT), Anterior Chamber Depth (ACD), Lens Thickness (LT), Pupil Diameter (P), White-to-White
distance (WTW). The measurement and visualization assist in the determination of the
appropriate power and type of intraocular lens.
Axial length (AL) is the distance from the corneal apex to the fovea or more specifically, to the
RPE (Retnal Pigment Epithelium). The calculation is performed as the sum of the thicknesses
of the cornea, aqueous humor, lens, and vitreous humor and neurosensory retina.
Corneal thickness (CCT) is the distance between the anterior and the posterior surface of the
cornea.
Anterior Chamber Depth (ACD) is the distance between the anterior surface of the crystalline
(anterior capsule) and the outermost stratum of the cornea (epithelium).
Lens thickness (LT) is the distance between the anterior and the posterior surfaces of the lens
divided by its refractive index.
WTW is the distance from limbus to limbus of the eye.
Pupil diameter –is measured horizontally through the center of the pupil
NOTE Since the device measures up to the retinal pigmented epithelium, the
reading displayed is adjusted to the internal limiting membrane, as a function of
axial length or manually.
WARNING!
Users must check measurement readings for plausibility. This includes the checking
of the detected position boundaries on B-scan and the adjusted lines, which
automatically adjust to the signal, whenever one of the measurements displays an
unusually high standard deviation. The operator must also take into account the
type (e.g., posterior subcapsular cataract) and density of the cataract when
evaluating plausibility.
NOTE If the patient has previously undergone cataract surgery, available records
should be consulted for plausibility check of the measurement.
To Next Page
Loading...
