Comprehensive eye examinations included measurements of AL and intraocular pressure. Axial length was measured with an OA-1000 (Tomey), which uses the same partial coherence interferometry technique as the IOL Master instrument (Carl Zeiss AG) to measure signals from the tear film and retinal pigment epithelium. Ten valid AL readings were taken and averaged. Intraocular pressure was measured 3 times for each eye and averaged using a TX-20P Full Auto Tonometer (Canon).
Oa 1000
Manufactured by Tomey
Sourced in Japan
The OA-1000 is a laboratory equipment designed for optical analysis. It is capable of performing various optical measurements and tests. The core function of the OA-1000 is to analyze and characterize optical properties of materials and devices.
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Lab products found in correlation
5 protocols using oa 1000
1
Comprehensive Eye Measurements and IOP
2
Systemic and Ocular Parameter Measurements
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Systolic blood pressure (SBP, mmHg), diastolic blood pressure (DBP, mmHg), and heart rate [beats per minute (bpm)] were measured as systemic parameters. We also measured intraocular pressure (IOP, mmHg), axial length (AL, mm), cycloplegic SE, and BCVA as ocular parameters. IOP and cycloplegic SE were measured using a TONOREF 2™ device (Nidek, Aichi, Japan) and AL was measured using an optical biometer OA1000™ (Tomey, Aichi, Japan). The BCVA was measured at a 5 m distance. The mean arterial blood pressure (MABP, mmHg) and ocular perfusion pressure (OPP, mmHG) were calculated using the following formulas. MABP formula: DBP + (SBP – DBP)/3. OPP formula: (2/3MABP) – IOP.
3
Comprehensive Eye Examination in Healthy Volunteers
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One hundred forty-eight student volunteers from Kitasato University were recruited. The study followed the tenets of the Declaration of Helsinki, and written informed consent was obtained from each participant after receiving approval from the Ethics Committee of Kitasato University School of Allied Health Science (No. 2012-07).
All the volunteers underwent comprehensive ophthalmic examinations including noncycloplegic refraction testing (KR-8100PA, Topcon, Japan), visual acuity testing at 5 m using a Landolt ring chart, intraocular pressure (NT-530P, NIDEK, Japan) and axial length measurements (OA-1000, TOMEY, Japan), and fundus examination by a glaucoma specialist. Those with corrected visual acuity of 20/20 or better, intraocular pressure of 21 mmHg or less, normal optic disc, and no fundus disease were included.
All the volunteers underwent comprehensive ophthalmic examinations including noncycloplegic refraction testing (KR-8100PA, Topcon, Japan), visual acuity testing at 5 m using a Landolt ring chart, intraocular pressure (NT-530P, NIDEK, Japan) and axial length measurements (OA-1000, TOMEY, Japan), and fundus examination by a glaucoma specialist. Those with corrected visual acuity of 20/20 or better, intraocular pressure of 21 mmHg or less, normal optic disc, and no fundus disease were included.
4
Comprehensive Ophthalmic Evaluation for Glaucoma
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The patients underwent routine preoperative ophthalmic evaluations including measurement of best-corrected visual acuity (BCVA) with a 5-meter Landolt chart, slit-lamp examination, intraocular pressure (IOP) measurements using a Goldmann applanation tonometer, axial length measurement (OA-1000, TOMEY, Tokyo, Japan), gonioscopy, dilated fundus examination, fundus photography, standard automated perimetry (SAP, Humphrey visual field Analyzer II, 24–2 Swedish interactive threshold algorithm, Humphrey-Zeiss instrument, Dublin, CA), and spectral-domain OCT examination using a RS-3000 Retina Scan (Nidek Inc., Gamagori, Aichi, Japan).
Glaucoma was diagnosed by abnormalities in the optic disc (enlarged cupping, neuroretinal rim thinning and retinal nerve fiber layer defects) and reproducible VF defects corresponding to the optic disc changes. A glaucomatous VF defect was defined as follows: 1) a cluster of three points with a probability <5% on a pattern deviation map in at least one hemifield and including at least one point with a probability <1%, or a cluster of two points with a probability <1%; 2) glaucoma hemifield test results outside normal limits; and 3) pattern standard deviation <5%. The eyes in the control group had no glaucomatous abnormalities in the optic disc.
Glaucoma was diagnosed by abnormalities in the optic disc (enlarged cupping, neuroretinal rim thinning and retinal nerve fiber layer defects) and reproducible VF defects corresponding to the optic disc changes. A glaucomatous VF defect was defined as follows: 1) a cluster of three points with a probability <5% on a pattern deviation map in at least one hemifield and including at least one point with a probability <1%, or a cluster of two points with a probability <1%; 2) glaucoma hemifield test results outside normal limits; and 3) pattern standard deviation <5%. The eyes in the control group had no glaucomatous abnormalities in the optic disc.
5
Preoperative Ophthalmic Characteristics in Glaucoma
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The other data regarding patient characteristics were gender, age, glaucoma type, and other preoperative ophthalmic data, including preoperative IOP, number of medications, corneal thickness, anterior chamber depth, axial length, best-corrected visual acuity, and visual field. Corneal thickness, anterior chamber depth, and axial length were measured with optical coherence interferometry (OA-1000; Tomey, Aichi, Japan). A logarithm of the reciprocal of the decimal BCVA was used to approximate the logarithm of the minimal angle of resolution (LogMAR). Visual field testing was performed using a static automated white-on-white threshold 24-2 perimetry program, SITA Standard (Model 750; Zeiss, Tokyo, Japan). If the eye had advanced visual field loss, a 10-2 perimetry program was used.
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