Dry eyes, possibly causing inaccurate corneal curvature measurements
Dec 23, 2024
A research team led by Professor Kim Dong-hyun of Korea University Anam Hospital revealed that dry eyes greatly affect the variability of corneal curvature levels.
Corneal curvature values are very important measurements predicting outcomes in cataract surgery or corneal refraction surgery. The higher the variability of the measurements, the lower the accuracy of the surgery and the lower the postoperative vision prognosis.
In particular, cataract surgery is the most frequently performed ophthalmic surgery worldwide, so it is necessary to minimize the variability of corneal curvature levels in order to increase the accuracy of predicted surgical results, which has raised the need for related research.
The research team measured and analyzed corneal curvature levels twice using the advanced ocular measurement test equipment IOLMaster 700, which is mainly used in clinical settings, on 60 patients scheduled for cataract surgery from March to November 2023.
As a result of the study, the group with high variability with a corneal curvature error of 0.25D or more had a tear film destruction time of 3.1±1.3 seconds and a corneal staining score of 1.1±0.6 points to measure the degree of corneal damage. The group with low variability with a corneal curvature error of less than 0.25D had a tear film destruction time of 4.0±1.4 seconds and a corneal staining score of 0.6±0.6.
The research team confirmed that the group with high corneal curvature error variability had lower stability and higher corneal damage than the group with low corneal curvature error. The tear film destruction time and corneal damage score are the main findings of dry eye, meaning that the more severe dry eye, the higher the variability in corneal curvature levels.
Professor Kim Dong-hyun said "The more severe the dry eye is, the greater the likelihood of predicting refractive values after ophthalmic surgery, so it is essential for patients scheduled for ophthalmic surgery to manage dry eye before surgery."
Professor Kim then added "We plan to explore an optimization plan to effectively manage dry eyes before cataract surgery or refractive surgery through future research."
Meanwhile, the study 'Short-term variability in regular biometrics and the impact of proactive dry eye' was published in the November issue of the world-renowned international academic journal 『Scientific Reports』.
Corneal curvature values are very important measurements predicting outcomes in cataract surgery or corneal refraction surgery. The higher the variability of the measurements, the lower the accuracy of the surgery and the lower the postoperative vision prognosis.
In particular, cataract surgery is the most frequently performed ophthalmic surgery worldwide, so it is necessary to minimize the variability of corneal curvature levels in order to increase the accuracy of predicted surgical results, which has raised the need for related research.
The research team measured and analyzed corneal curvature levels twice using the advanced ocular measurement test equipment IOLMaster 700, which is mainly used in clinical settings, on 60 patients scheduled for cataract surgery from March to November 2023.
As a result of the study, the group with high variability with a corneal curvature error of 0.25D or more had a tear film destruction time of 3.1±1.3 seconds and a corneal staining score of 1.1±0.6 points to measure the degree of corneal damage. The group with low variability with a corneal curvature error of less than 0.25D had a tear film destruction time of 4.0±1.4 seconds and a corneal staining score of 0.6±0.6.
The research team confirmed that the group with high corneal curvature error variability had lower stability and higher corneal damage than the group with low corneal curvature error. The tear film destruction time and corneal damage score are the main findings of dry eye, meaning that the more severe dry eye, the higher the variability in corneal curvature levels.
Professor Kim Dong-hyun said "The more severe the dry eye is, the greater the likelihood of predicting refractive values after ophthalmic surgery, so it is essential for patients scheduled for ophthalmic surgery to manage dry eye before surgery."
Professor Kim then added "We plan to explore an optimization plan to effectively manage dry eyes before cataract surgery or refractive surgery through future research."
Meanwhile, the study 'Short-term variability in regular biometrics and the impact of proactive dry eye' was published in the November issue of the world-renowned international academic journal 『Scientific Reports』.
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