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Ultrasound Vs. Optical Biometry | 合法醫療器材資訊網

Ultrasound Vs. Optical Biometry

2011年5月16日—Sinceopticalbiometrymeasurestothecenterofthemacula,itgivestherefractiveaxiallengthversustheanatomicaxiallengthachievedwith ...

 Ultrasound Vs. Optical Biometry

Precise biometry is essential for accurate outcomes in cataract and refractive surgeries. Ultrasound axial length measurements have been the gold standard for many years. With the introduction of optical biometry, technology has become more advanced. Partial coherence interferometry based biometry presents an alternative for precise ocular measurements, used not only for axial length, but anterior chamber depth, pachymetry and lens and retinal thickness measurements.

Optical biometry uses a 780 um infrared light wave that has 8x the resolution of a 10 MHz sound wave, making the measurement of axial length very precise and avoiding operator variations in measurements. Also increasing the accuracy is the fact that contact with the cornea is not needed, eliminating variations due to compression on the cornea. Since optical biometry measures to the center of the macula, it gives the refractive axial length versus the anatomic axial len...

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Laser vs ultrasound biometry—a study of intra | 合法醫療器材資訊網
由 S Goel 著作 · 2004 · 被引用 25 次 — Biometric failure was seen in 12% of eyes undergoing laser and 1% undergoing ultrasound biometry. Conclusion Axial length determination by ... Read More
A-Scan Biometry | 合法醫療器材資訊網
2016年4月20日 — Ultrasound biometers use a pulse system, pulsing electricity to the probe tip where a crystal element vibrates and emits the sound beam at its ... Read More
Ultrasound Vs. Optical Biometry | 合法醫療器材資訊網
2011年5月16日 — Since optical biometry measures to the center of the macula, it gives the refractive axial length versus the anatomic axial length achieved with ... Read More
A | 合法醫療器材資訊網
A-scan ultrasound biometry, commonly referred to as an A-scan (short for Amplitude scan), is a routine type of diagnostic test used in optometry or ... Read More
Laser vs ultrasound biometry--a study of intra | 合法醫療器材資訊網
由 S Goel 著作 · 2004 · 被引用 25 次 — Laser vs ultrasound biometry--a study of intra- and interobserver variability. Eye (​Lond). 2004 May;18(5):514-8. doi: 10.1038/sj.eye.6700705. Read More
Comparing ultrasound biometry with partial coherence ... | 合法醫療器材資訊網
由 S Raymond 著作 · 2009 · 被引用 46 次 — The results of this trial demonstrated that the calculation of IOL power based on ocular axial length measurement with PCI technology provided no clinical ... Read More
Comparison of optical biometry and applanation ultrasound ... | 合法醫療器材資訊網
由 FR Nakhli 著作 · 2014 · 被引用 35 次 — Materials and methods: This prospective study enrolled 55 (68 eyes) consecutive patients scheduled for cataract surgery at Dhahran Eye Specialist Hospital ( ... Read More
Ultrasound and Optical Biometry | 合法醫療器材資訊網
Optical biometry gives us the true optical axial length of the eye, from the anterior corneal vertex to the photoreceptors on the back of the retina, eliminating the two​ ... Read More
Ultrasound Biometry vs. IOL Master | 合法醫療器材資訊網
由 A Roy 著作 · 2012 · 被引用 10 次 — Ultrasound biometry (US) followed by partial coherence interferometry (PCI) was done on all patients in the eye to be operated by masked independent ... Read More
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