Normative Values for Corneal Tomography and Comparison of Both Eyes in Young Saudi Males with 20/20 Vision Using Pentacam-HR Scheimpflug Imaging
Omar Alshehri,1 Ahmed M Abdelaal,2 Ghufran Abudawood,1 Muhammad A Khan,3 Saud Alsharif,4 Hassan Hijazi,1 AlBaraa AlQassimi1 1Ophthalmology Department, King Fahad Armed Forces Hospital, Jeddah, Saudi Arabia; 2Ophthalmology Department, Prince Sultan Military Medical City, Riyadh, Saudi Arabia; 3Epidem...
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| Format: | Article |
| Language: | English |
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Dove Medical Press
2022-08-01
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| Series: | Clinical Ophthalmology |
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| Online Access: | https://www.dovepress.com/normative-values-for-corneal-tomography-and-comparison-of-both-eyes-in-peer-reviewed-fulltext-article-OPTH |
| _version_ | 1818497214729682944 |
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| author | Alshehri O Abdelaal AM Abudawood G Khan MA Alsharif S Hijazi H AlQassimi A |
| author_facet | Alshehri O Abdelaal AM Abudawood G Khan MA Alsharif S Hijazi H AlQassimi A |
| author_sort | Alshehri O |
| collection | DOAJ |
| description | Omar Alshehri,1 Ahmed M Abdelaal,2 Ghufran Abudawood,1 Muhammad A Khan,3 Saud Alsharif,4 Hassan Hijazi,1 AlBaraa AlQassimi1 1Ophthalmology Department, King Fahad Armed Forces Hospital, Jeddah, Saudi Arabia; 2Ophthalmology Department, Prince Sultan Military Medical City, Riyadh, Saudi Arabia; 3Epidemiology and Public Health Department, King Saud Bin Abdulaziz University, Jeddah, Saudi Arabia; 4Faculty of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi ArabiaCorrespondence: Ahmed M Abdelaal, Ophthalmology Department, Prince Sultan Military Medical City, Riyadh, Saudi Arabia, Tel +966 56 371 8789, Email ahmed3bdelaal@gmail.comPurpose: Anterior segment evaluation using Scheimpflug imaging with the Pentacam scanner allows the acquisition of a plethora of information. It aids in screening and diagnosing corneal pathologies and determining suitability for keratorefractive procedures. This research has significant benefits in terms of establishing normative tomographic values, which is crucial in countries where Keratoconus (KC) is more prevalent, especially among young age group, along with aiding future research in the field of refractive surgery by providing relevant normative data.Methods: A retrospective review of digital corneal tomography images for a group of medically and ophthalmologically free males aged between 18 and 21 years with 20/20 unaided distant visual acuity was performed.Results: A total of 1272 subjects (2544 eyes) were included. Findings revealed a mean maximal corneal curvature (Kmax) of 42.91 ± 1.40D (range 36.90– 47.80D). The mean flat keratometry (K1) was 41.87 ± 1.31D (range 36.00– 46.40D). The mean steep keratometry (K2) was 42.66 ± 1.35D (range 36.70– 47.60D). The mean corneal astigmatism (CA) was 0.79 ± 0.37D (range 0.00D-2.30D). The mean central corneal thickness (CCT) was 558.53 ± 33.84 μm (range 421– 677 μm). The mean thinnest corneal location thickness (TCLT) was 551.64 ± 34.08 μm (range 417– 669μm). The mean corneal diameter (CD) and anterior chamber depth (ACD) were 12.13 ± 0.39 mm (range 10.50– 13.60 mm) and 3.12 ± 0.29 mm (range 2.08– 4.08 mm), respectively. The median differences between both eyes of the same subject were as follows: kmax difference of 0.20D (IQR 0.1– 0.4); K1, K2 and CA difference of 0.20D (IQR 0.1– 0.3) for all 3 parameters; CCT and TCLT difference of 5.00 μm (IQR 3.0– 9.0) and 6.00 μm (IQR 3.0– 10.0), respectively; CD difference of 0.10 mm (IQR 0.0– 0.1); and ACD difference of 0.04 (IQR 0.02– 0.06).Conclusion: We believe our data can aid in establishing normative tomographic values and acceptable differences between both eyes. Our data may also help detect subtle corneal pathology and be useful for researchers and innovators in the field of ophthalmology.Keywords: corneal tomography, corneal topography, pentacam, normative values, Saudi Arabia |
| first_indexed | 2024-12-10T18:42:55Z |
| format | Article |
| id | doaj.art-612a6f2f97c6426498779abe4c3fc9f9 |
| institution | Directory Open Access Journal |
| issn | 1177-5483 |
| language | English |
| last_indexed | 2024-12-10T18:42:55Z |
| publishDate | 2022-08-01 |
| publisher | Dove Medical Press |
| record_format | Article |
| series | Clinical Ophthalmology |
| spelling | doaj.art-612a6f2f97c6426498779abe4c3fc9f92022-12-22T01:37:36ZengDove Medical PressClinical Ophthalmology1177-54832022-08-01Volume 162631263777374Normative Values for Corneal Tomography and Comparison of Both Eyes in Young Saudi Males with 20/20 Vision Using Pentacam-HR Scheimpflug ImagingAlshehri OAbdelaal AMAbudawood GKhan MAAlsharif SHijazi HAlQassimi AOmar Alshehri,1 Ahmed M Abdelaal,2 Ghufran Abudawood,1 Muhammad A Khan,3 Saud Alsharif,4 Hassan Hijazi,1 AlBaraa AlQassimi1 1Ophthalmology Department, King Fahad Armed Forces Hospital, Jeddah, Saudi Arabia; 2Ophthalmology Department, Prince Sultan Military Medical City, Riyadh, Saudi Arabia; 3Epidemiology and Public Health Department, King Saud Bin Abdulaziz University, Jeddah, Saudi Arabia; 4Faculty of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi ArabiaCorrespondence: Ahmed M Abdelaal, Ophthalmology Department, Prince Sultan Military Medical City, Riyadh, Saudi Arabia, Tel +966 56 371 8789, Email ahmed3bdelaal@gmail.comPurpose: Anterior segment evaluation using Scheimpflug imaging with the Pentacam scanner allows the acquisition of a plethora of information. It aids in screening and diagnosing corneal pathologies and determining suitability for keratorefractive procedures. This research has significant benefits in terms of establishing normative tomographic values, which is crucial in countries where Keratoconus (KC) is more prevalent, especially among young age group, along with aiding future research in the field of refractive surgery by providing relevant normative data.Methods: A retrospective review of digital corneal tomography images for a group of medically and ophthalmologically free males aged between 18 and 21 years with 20/20 unaided distant visual acuity was performed.Results: A total of 1272 subjects (2544 eyes) were included. Findings revealed a mean maximal corneal curvature (Kmax) of 42.91 ± 1.40D (range 36.90– 47.80D). The mean flat keratometry (K1) was 41.87 ± 1.31D (range 36.00– 46.40D). The mean steep keratometry (K2) was 42.66 ± 1.35D (range 36.70– 47.60D). The mean corneal astigmatism (CA) was 0.79 ± 0.37D (range 0.00D-2.30D). The mean central corneal thickness (CCT) was 558.53 ± 33.84 μm (range 421– 677 μm). The mean thinnest corneal location thickness (TCLT) was 551.64 ± 34.08 μm (range 417– 669μm). The mean corneal diameter (CD) and anterior chamber depth (ACD) were 12.13 ± 0.39 mm (range 10.50– 13.60 mm) and 3.12 ± 0.29 mm (range 2.08– 4.08 mm), respectively. The median differences between both eyes of the same subject were as follows: kmax difference of 0.20D (IQR 0.1– 0.4); K1, K2 and CA difference of 0.20D (IQR 0.1– 0.3) for all 3 parameters; CCT and TCLT difference of 5.00 μm (IQR 3.0– 9.0) and 6.00 μm (IQR 3.0– 10.0), respectively; CD difference of 0.10 mm (IQR 0.0– 0.1); and ACD difference of 0.04 (IQR 0.02– 0.06).Conclusion: We believe our data can aid in establishing normative tomographic values and acceptable differences between both eyes. Our data may also help detect subtle corneal pathology and be useful for researchers and innovators in the field of ophthalmology.Keywords: corneal tomography, corneal topography, pentacam, normative values, Saudi Arabiahttps://www.dovepress.com/normative-values-for-corneal-tomography-and-comparison-of-both-eyes-in-peer-reviewed-fulltext-article-OPTHcorneal tomographycorneal topographypentacamnormative valuessaudi arabia. |
| spellingShingle | Alshehri O Abdelaal AM Abudawood G Khan MA Alsharif S Hijazi H AlQassimi A Normative Values for Corneal Tomography and Comparison of Both Eyes in Young Saudi Males with 20/20 Vision Using Pentacam-HR Scheimpflug Imaging Clinical Ophthalmology corneal tomography corneal topography pentacam normative values saudi arabia. |
| title | Normative Values for Corneal Tomography and Comparison of Both Eyes in Young Saudi Males with 20/20 Vision Using Pentacam-HR Scheimpflug Imaging |
| title_full | Normative Values for Corneal Tomography and Comparison of Both Eyes in Young Saudi Males with 20/20 Vision Using Pentacam-HR Scheimpflug Imaging |
| title_fullStr | Normative Values for Corneal Tomography and Comparison of Both Eyes in Young Saudi Males with 20/20 Vision Using Pentacam-HR Scheimpflug Imaging |
| title_full_unstemmed | Normative Values for Corneal Tomography and Comparison of Both Eyes in Young Saudi Males with 20/20 Vision Using Pentacam-HR Scheimpflug Imaging |
| title_short | Normative Values for Corneal Tomography and Comparison of Both Eyes in Young Saudi Males with 20/20 Vision Using Pentacam-HR Scheimpflug Imaging |
| title_sort | normative values for corneal tomography and comparison of both eyes in young saudi males with 20 20 vision using pentacam hr scheimpflug imaging |
| topic | corneal tomography corneal topography pentacam normative values saudi arabia. |
| url | https://www.dovepress.com/normative-values-for-corneal-tomography-and-comparison-of-both-eyes-in-peer-reviewed-fulltext-article-OPTH |
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