Results 171 to 180 of about 10,303 (219)
Some of the next articles are maybe not open access.
Current Eye Research, 2012
To compare keratometry measurements obtained using an automated keratometer (AK, IOLMaster) and a Scheimpflug keratometer (Pentacam) in predicting residual astigmatism after cataract surgery.Preoperative corneal astigmatism was calculated using preoperative refraction, an AK and a Scheimpflug keratometer (anterior corneal power [ACP] and true net power
Choul Yong Park, Roy S Chuck
exaly +3 more sources
To compare keratometry measurements obtained using an automated keratometer (AK, IOLMaster) and a Scheimpflug keratometer (Pentacam) in predicting residual astigmatism after cataract surgery.Preoperative corneal astigmatism was calculated using preoperative refraction, an AK and a Scheimpflug keratometer (anterior corneal power [ACP] and true net power
Choul Yong Park, Roy S Chuck
exaly +3 more sources
Graefe's Archive for Clinical and Experimental Ophthalmology
To investigate the effect of posterior keratometry (PK) on the accuracy of 10 intraocular lens (IOL) power calculation formulas using standard keratometry (K) and total keratometry (TK).This is a retrospective consecutive case-series study. The IOL power was calculated using K and TK measured by IOLMaster 700 in 6 new-generation formulas (Barrett ...
Jiaqing Zhang +2 more
exaly +3 more sources
To investigate the effect of posterior keratometry (PK) on the accuracy of 10 intraocular lens (IOL) power calculation formulas using standard keratometry (K) and total keratometry (TK).This is a retrospective consecutive case-series study. The IOL power was calculated using K and TK measured by IOLMaster 700 in 6 new-generation formulas (Barrett ...
Jiaqing Zhang +2 more
exaly +3 more sources
International Ophthalmology, 2018
To compare the accuracy of the anterior corneal simulated keratometry (SimK) and the Holladay equivalent keratometry reading (EKR) provided by a Scheimpflug camera (Pentacam HR) with the keratometry (K) provided by a Placido system (T-Cone topography) in keratoconus and control eyes.This prospective study included 40 consecutive patients with ...
Ayhan Saglik, Hakim Çelik
exaly +3 more sources
To compare the accuracy of the anterior corneal simulated keratometry (SimK) and the Holladay equivalent keratometry reading (EKR) provided by a Scheimpflug camera (Pentacam HR) with the keratometry (K) provided by a Placido system (T-Cone topography) in keratoconus and control eyes.This prospective study included 40 consecutive patients with ...
Ayhan Saglik, Hakim Çelik
exaly +3 more sources
Comparison of portable automated keratometry and manual keratometry for IOL calculation
Journal of Cataract and Refractive Surgery, 1997To compare the accuracy of portable automated keratometry (PAK) with that of manual keratometry (MK) in measuring corneal power for intraocular lens calculations.Wilford Hall Medical Center, San Antonio, Texas, USA.In Part 1 of the study, five ophthalmic technicians performed keratometric analysis in 20 eyes in 10 volunteers using both manual and ...
C A, Manning, P M, Kloess
openaire +2 more sources
Keratometry in Epikeratophakia
Journal of Refractive Surgery, 1986ABSTRACT: In keratomileusis and radial keratotomy, keratometry does not accurately reflect the change in refraction produced by the surgery. The authors report that this also occurs in patients undergoing epikeratophakia. The keratometer underestimates the clinically observed changes in refractive error, and changes in keratometry ...
Robert C Arffa +2 more
openaire +1 more source
Scheimpflug keratometry versus conventional automated keratometry in routine cataract surgery
Journal of Cataract and Refractive Surgery, 2010To evaluate keratometry (K) readings obtained with an automated keratometer (IOLMaster) and Scheimpflug imaging (Pentacam) in eyes having routine cataract surgery and to compare the predicted and actual refractive outcomes.Epsom/St. Helier University Hospitals, London, United Kingdom.In this retrospective study, the mean absolute prediction errors ...
Richard J, Symes +2 more
openaire +2 more sources
American Journal of Ophthalmology, 1978
We obtained steel test balls for keratometer calibration at nominal cost by using a selected set of steel ball bearings, readily available for nonoptical purposes. The set of keratometer tests balls each have an accuracy of greater than one part in 1,000.
openaire +2 more sources
We obtained steel test balls for keratometer calibration at nominal cost by using a selected set of steel ball bearings, readily available for nonoptical purposes. The set of keratometer tests balls each have an accuracy of greater than one part in 1,000.
openaire +2 more sources
Comparison of three keratometry instruments
Journal of Cataract and Refractive Surgery, 1995We compared the reliability of measurements of three keratometers and keratometry readings from a corneal topography system to determine if they were as accurate as the "gold standard" Javal-Schiotz keratometer. Same-day measurement of the steepest and flattest powers of the central 3 mm of the corneas of 200 eyes (100 patients) revealed no ...
D G, Tennen, R H, Keates, C, Montoya
openaire +2 more sources
Journal of Cataract and Refractive Surgery, 2010
To evaluate the precision of the axial length (AL), keratometry (K), anterior chamber depth (ACD), astigmatism, and minus astigmatic cylinder axis measurements by a partial coherence interferometry (PCI)-keratometry device.Private practice, Lynwood, California.This prospective comparative observational study analyzed measurements in the second eye to ...
H John, Shammas, Steven, Chan
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To evaluate the precision of the axial length (AL), keratometry (K), anterior chamber depth (ACD), astigmatism, and minus astigmatic cylinder axis measurements by a partial coherence interferometry (PCI)-keratometry device.Private practice, Lynwood, California.This prospective comparative observational study analyzed measurements in the second eye to ...
H John, Shammas, Steven, Chan
openaire +2 more sources
Clinical and Experimental Optometry, 1973
The literature relating to keratometers and keratometry is reviewed to ascertain characteristics of the instrument that affect its use in the measurement of the anterior corneal surface, and to col...
openaire +1 more source
The literature relating to keratometers and keratometry is reviewed to ascertain characteristics of the instrument that affect its use in the measurement of the anterior corneal surface, and to col...
openaire +1 more source