Comparison of optical biometry based on partial coherence laser interferometry (PCLI) principle to conventional applanation ultrasonic biometry

Optical biometry is based on the laser interferometry technique for the measurement of the biometric characteristics of the eyes, such as the antero-posterior axial length, anterior chamber depth, lens and retina thickness, corneal diameter and parameters of keratometry. The present article was designed to overview the basic principles of this method, its advantages and disadvantages, indications and contraindications for its application. The comparative analysis of the characteristics of the following optical biometric devices was undertaken: IOL-Master 500, Lenstar LS 900, Aladdin, OA-1000, OA-2000, Al-3000, Al-Scan, Galilei G6, IOL-Master 700.

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Biometric Indices Evaluation in Central Retinal Vein Occlusion using Partial Coherence Laser Interferometry

European Journal of Ophthalmology ◽

10.1177/112067210701700318 ◽

2007 ◽

Vol 17 (3) ◽

pp. 383-387 ◽

Cited By ~ 1

Author(s):

S. Moghimi ◽

A. Mirshahi ◽

A. Lasheie ◽

M. Maghsoudipour ◽

A. Beheshtnejaad

Keyword(s):

Retinal Vein Occlusion ◽

Central Retinal Vein Occlusion ◽

Laser Interferometry ◽

Partial Coherence ◽

Vein Occlusion ◽

Biometric Indices ◽

Central Retinal Vein

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Distribution of Axial Length and Ocular Biometry Measured Using Partial Coherence Laser Interferometry (IOL Master) in an Older White Population

Ophthalmology ◽

10.1016/j.ophtha.2009.07.028 ◽

2010 ◽

Vol 117 (3) ◽

pp. 417-423 ◽

Cited By ~ 68

Author(s):

Reena Fotedar ◽

Jie Jin Wang ◽

George Burlutsky ◽

Ian G. Morgan ◽

Kathryn Rose ◽

...

Keyword(s):

Axial Length ◽

Laser Interferometry ◽

Partial Coherence ◽

White Population ◽

Ocular Biometry

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Refractive results after cataract surgery using Optical biometry

Pakistan Journal of Ophthalmology ◽

10.36351/pjo.v36i1.994 ◽

2020 ◽

Vol 36 (1) ◽

Author(s):

Muneer Quraishy ◽

Mehvish Hussain ◽

Muhammad Akram

Keyword(s):

Cataract Surgery ◽

Intraoperative Complications ◽

Case Series ◽

Partial Coherence ◽

Ophthalmological Examination ◽

Corneal Incision ◽

Optical Biometry ◽

Partial Coherence Interferometry ◽

Clear Corneal Incision ◽

Refractive Outcomes

Purpose: To assess the refractive outcome of optical biometry (Nidek AL-scan) after elective phacoemulsification in a study of 30 eyes. Study Design: Descriptive case series. Place and Duration of Study: Elective cataract surgeries done at a private clinic from July 2015 to June 2016 were selected and their records were analyzed. Material Methods: The measurements of IOL calculation was done using optical biometry with partial coherence interferometry (Nidek AL-scan) that provides information about axial length, central keratometry, white to white diameter and anterior chamber anatomical depth. SRK-T formula was used to calculate IOL power. All patients underwent a complete ophthalmological examination. Phacoemulsification with clear corneal incision of 2.75 mm was done and IOL was implanted in the bag (Alcon Acrysof SN60WF IOL and MA60AC IOL). Post-operative refraction was taken with autorefractor (Huvitz HRK-7000) after 4 weeks and it was compared with pre-operative objective refraction. Comparison of K readings taken by AL-scan and autorefractor were done. Results: We studied 30 eyes of 23 patients who underwent elective cataract surgery with foldable IOL. Post-operative spherical equivalent was plano in 53% of cases with mean of -0.05 after 4 weeks postoperatively. The mean keratometric power using autorefractor was 44.4 D while with AL-scan it was 44.7 D. There were no intraoperative complications or postoperative subjective complaints (such as halo or glare) in our patients. Conclusion: Intraocular lens power calculations done by optical biometry are easy to use, reliable and result in excellent refractive outcomes. Ultrasound biometry may still be required in case of mature and dense posterior subcapsular cataract.

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