&lt;title&gt;Measurement of the axial eye length and retinal thickness by laser Doppler interferometry&lt;/title&gt;

Hitzenberger, Christoph K.; Fercher, Adolf Friedrich; Juchem, M.

doi:10.1117/12.44651

Cited by 70 publications

(106 citation statements)

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“…The close match found between axial length measurements using the IOLMaster and applanation ultrasound (0.02 (0.32) mm) is consistent with those reported previously by Hitzenberger,8 who found a difference between Doppler interferometry and water immersion ultrasonography of 0.01 (0.13) mm. This study has found a closer agreement between PCI and applanation ultrasonography than most of the previous reports.…”

Section: Validitysupporting

confidence: 91%

“…[30][31][32][33][34] Previous studies have determined retinal contour using relatively complex computer software analysis which requires input data obtained from A-scan ultrasonography, keratometry, and peripheral refraction, 30 31 35 magnetic resonance imaging, 36 or the indirect estimation of retinal contour from peripheral refraction. 32 33 Determination of retinal contour with PCI methods has been previously reported for a single individual 8 and represents a valuable facility for future studies on posterior segment dimensions. The axial length:corneal radius ratio has been proposed as a biometric predictor for the onset and development of myopia, particularly in children.…”

Section: Repeatabilitymentioning

confidence: 99%

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A new non-contact optical device for ocular biometry

Santodomingo-Rubido

Mallen

Gilmartin

et al. 2002

British Journal of Ophthalmology

251

210

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Background: A new commercially available device (IOLMaster, Zeiss Instruments) provides high resolution non-contact measurements of axial length (using partial coherent interferometry), anterior chamber depth, and corneal radius (using image analysis). The study evaluates the validity and repeatability of these measurements and compares the findings with those obtained from instrumentation currently used in clinical practice. Method: Measurements were taken on 52 subjects (104 eyes) aged 18-40 years with a range of mean spherical refractive error from +7.0 D to −9.50 D. IOLMaster measurements of anterior chamber depth and axial length were compared with A-scan applanation ultrasonography (Storz Omega) and those for corneal radius with a Javal-Schiötz keratometer (Topcon) and an EyeSys corneal videokeratoscope. Results: Axial length: the difference between IOLMaster and ultrasound measures was insignificant (0.02 (SD 0.32) mm, p = 0.47) with no bias across the range sampled (22.40-27.99 mm). Anterior chamber depth: significantly shorter depths than ultrasound were found with the IOLMaster (−0.06 (0.25) mm, p <0.02) with no bias across the range sampled (2.85-4.40 mm). Corneal radius: IOLMaster measurements matched more closely those of the keratometer than those of the videokeratoscope (mean difference −0.03 v −0.06 mm respectively), but were more variable (95% confidence 0.13 v 0.07 mm). The repeatability of all the above IOLMaster biometric measures was found to be of a high order with no significant bias across the measurement ranges sampled. Conclusions: The validity and repeatability of measurements provided by the IOLMaster will augment future studies in ocular biometry.

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Section: Validitysupporting

confidence: 91%

Section: Repeatabilitymentioning

confidence: 99%

A new non-contact optical device for ocular biometry

Santodomingo-Rubido

Mallen

Gilmartin

et al. 2002

British Journal of Ophthalmology

251

210

View full text Add to dashboard Cite

show abstract

“…Low-coherence interferometry as the general principle of OCT has been described elsewhere in detail 1 2. The use of super luminescent diodes (SLD) as affordable and compact light sources facilitated greatly the dissemination of commercial systems.…”

Section: Optical Coherence Tomography: Pastmentioning

confidence: 99%

“…The basis for future developments of OCT in ophthalmology is measurements of the eye length by laser interferometry 1 2. The first ophthalmic imaging by OCT was reported by Huang and co-workers in 1991 3.…”

Section: Introductionmentioning

confidence: 99%

Retinal optical coherence tomography: past, present and future perspectives

Geitzenauer

Hitzenberger

Schmidt‐Erfurth

2010

British Journal of Ophthalmology

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Optical coherence tomography (OCT) has undergone substantial changes since its first use in the 1990s. Although the first generation of OCT systems heralded a new era in the non-invasive diagnostic options in ophthalmology, they did not reveal much detail. Later devices offered more information and helped in the diagnosis and treatment of a variety of pathological conditions, primarily of the retina. With today's spectral-domain type models ophthalmologists are offered a comprehensive tool with the opportunity for early diagnosis and precise monitoring of patients with retinal and glaucomatous pathologies. However, as experience with these new devices grows and demands by clinicians and researchers rise, further improvements need to be addressed. Future developments in the improvement of the transverse resolution and extension of the penetration depth are to be expected. New modalities such as polarisation sensitive OCT (PS-OCT) or Doppler OCT are now in use and promise additional insights in the properties of physiological and pathological tissue. While PS-OCT reveals further detail in alterations of the retinal pigment epithelium, Doppler OCT gives additional information about blood flow measurements. With these and further new developments, OCT will continue to be an invaluable instrument in the armamentarium of modern ophthalmology.

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“…Ultrasound is the traditional technique for measuring anterior chamber depth (ACD) and axial length (AL) but is generally limited to a resolution of about ±0.15 mm 2 3. Partial coherence interferometry has subsequently been developed as an ocular biometry technique 4 5. Since the advent of the first commercial device in 2001 (IOLMaster, Carl Zeiss Jena GmbH), this has become the technique of choice for ocular biometry.…”

mentioning

confidence: 99%