Correlation between corneal thickness, keratometry, age, and differential pressure difference in healthy eyes

Colakoglu, Ahmet; Colakoglu, Iffet Emel; Cosar, C

doi:10.1038/s41598-021-83683-2

Cited by 6 publications

(3 citation statements)

References 54 publications

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“…The flat keratometry, steep keratometry, and mean keratometry values in our study were correlated with age, which is consistent with other reports. 5 7 9 13 24 …”

Section: Discussionmentioning

confidence: 99%

Ocular Biometric Values and Prevalence of Corneal Astigmatism in Patients Candidate for Cataract Surgery

Hashemian

Karimian

et al. 2022

Journal of Current Ophthalmology

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Purpose:To analyze the biometric values and the prevalence of corneal astigmatism in cataract surgery candidates.Methods:This is a prospective study. Ocular biometric values and corneal keratometric astigmatism were measured by optical low-coherence reflectometry (Lenstar LS 900) before surgery in patients who were candidates for cataract extraction surgery. Descriptive measurements of biometric dimensions and keratometric cylinder data and their correlations with sex and age were evaluated.Results:Ocular biometric and keratometric values from 2084 eyes of 2084 patients (mean age 66.43, range 19–95 years) were analyzed. The mean values were as follows: corneal astigmatism 0.89 diopter (D), mean corneal keratometry 44.29 D, central corneal thickness 534 μ, internal anterior chamber depth (ACD) 3.11 mm, lens thickness 4.50 mm, and axial length 23.35 mm. Corneal astigmatism was <1.25 D in 1660 (79.5%) of eyes. Astigmatism was with-the-rule in 976 (46.8%) of eyes, against-the-rule (ATR) in 702 (33.7%), and oblique in 406 (19.5%). Analysis of corneal astigmatism revealed a change toward “ATR” with age which was not statistically significant. The ACD was correlated with age. The amount of corneal astigmatism had no correlation with age and sex.Conclusion:Corneal astigmatism was higher than 1.25 D in about 21% of cataract surgery candidates with slight differences between the various age ranges and had no correlation with age and sex.

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“…The flat keratometry, steep keratometry, and mean keratometry values in our study were correlated with age, which is consistent with other reports. 5 7 9 13 24 …”

Section: Discussionmentioning

confidence: 99%

Ocular Biometric Values and Prevalence of Corneal Astigmatism in Patients Candidate for Cataract Surgery

Hashemian

Karimian

et al. 2022

Journal of Current Ophthalmology

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“…CET is a part of CCT; in refractive surgery, the ratio of CET to CCT changes by 10% following surgery. [ 27 ] Therefore, we studied its impact on the correlation of CCT to tpIOP but found it was statistically insignificant.…”

Section: Discussionmentioning

confidence: 99%

Trans Palpebral Intraocular Pressure Measurement by Diaton Tonometer and Central Corneal Thickness in Eyes before and after Transepithelial Photorefractive Keratectomy of Saudi Patients

Alzuhairy

2022

Middle East African Journal of Ophthalmology

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PURPOSE: The influence of central corneal thickness (CCT) on intraocular pressure (IOP) measurement by Diaton is debatable. We present a correlation of CCT to transpalpebral IOP (tpIOP) and its determinants in patients undergoing transepithelial photorefractive keratectomy (TPRK) in Saudi Arabia. METHODS: In this cross-sectional study held in 2022, the IOP of patients undergoing TPRK was measured by Diaton tonometer. The CCT was measured before and 1 week after refractive surgery. The correlation coefficient of CCT and IOP and its Pearson P value were estimated. The effects of gender, type of refractive error (RE), and corneal epithelial thickness (CET) on the correlation of IOP to CCT were reviewed. RESULTS: We studied 202 eyes in 101 patients (Male: Female, 47:53; age 25.7 ± 5.8 years). The tpIOP was 15.1 ± 2.8 mmHg before, 15.9 ± 2.8 mmHg 1 week after, and 15.7 ± 4.1 mmHg 1 month after TPRK. The CCT was significantly correlated with tpIOP before surgery (Pearson correlation 0.168, P = 0.017) and after tPRK (Pearson correlation 0.246, P < 0.001). Gender ( P = 0.96), CET ( P = 0.43), and type of RE ( P = 0.99) were not significant determinants of correlation between CCT and tpIOP before TPRK. The correlation of tpIOP and CCT was not affected by gender ( P = 0.07), CET ( P = 0.39), and type of RE ( P = 0.13). CONCLUSION: CCT should be considered before interpreting tpIOP measured by with Diaton. Diaton could be a useful tool to monitor IOP changes in young patients undergoing refractive surgery.

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“…Visual acuity (VA) was estimated for each eye by a TOP-CON Auto Kerato-Refractometer KR-800S [39,40]. The test was without glasses, and the device automatically made an objective refraction and corrected the lens to the most optimal optic.…”

Section: Bmimentioning

confidence: 99%

Impaired postural control in diabetes—a predictor of falls?

et al. 2022

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Correlation between corneal thickness, keratometry, age, and differential pressure difference in healthy eyes

Cited by 6 publications

References 54 publications

Ocular Biometric Values and Prevalence of Corneal Astigmatism in Patients Candidate for Cataract Surgery

Ocular Biometric Values and Prevalence of Corneal Astigmatism in Patients Candidate for Cataract Surgery

Trans Palpebral Intraocular Pressure Measurement by Diaton Tonometer and Central Corneal Thickness in Eyes before and after Transepithelial Photorefractive Keratectomy of Saudi Patients

Impaired postural control in diabetes—a predictor of falls?

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