Based on device, the market is classified into slit lamp,
biometer, perimeter, tonometer, optical coherence tomography (oct) scanner, fundus camera, autorefractor & keratometer, and other devices.
Evaluation of the Lenstar LS 900 noncontact
biometer. Br J Ophthalmol.
Noncontact
biometers can provide some anterior segment measurements using the low-coherence reflectometry method.
More recently the Aladdin
biometer (Topcon, Tokyo, Japan) has become available for practitioners to use in a clinical setting.
Various biometric parameters such as axial length, anterior chamber depth (ACD), and lens thickness were measured by Nidek echo scan US 800 A--scan
biometer for both distant and near focus.
A-scan ultrasonography by (Quantel Medical
biometer) was done to measure ACD (anterior chamber depth).
Lensar is working to integrate additional topographers, including the Aladdin
Biometer.
TOF GUARD (
BioMeter International, Odense, Denmark) was applied, and after stabilizing the continuous response for the ulnar nerve stimulation with a supramaximal stimulus, the baseline height of the first twitch ([T.sub.o]%) and train-of-four ratio (TOF%) were measured.
The
BioMeter for preclinical/discovery transactions averaged
Denis, "Ocular biometry in children with hypermetropia: utility of the Lenstar LS 900 optical
biometer (Haag-Streit)," Journal Francais d'Ophtalmologie, vol.
Consequently, the UVB
biometer has a spectral response normalized to that at 297 nm (i.e., the normalized spectral response at 297 nm is equal to unity) and the logarithm of the normalized spectral response degrades linearly with wavelength and is ~ 0.01 at 320 nm and ~ 0.001 at 330 nm.