Evidence map›Paper›PMID 31916064›Full record

ArticleInternational ophthalmology2020

Corneal biomechanics in different age groups.

Ahmed Abdel Karim El Massry, Amr Ahmed Said, Ihab Mohamed Osman, Amr Saad Bessa, Mohammed Ahmed Elmasry, Eman Nabil Elsayed, Nader Hussein Lotfy Bayoumi

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Article in International ophthalmology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Ahmed Abdel Karim El MassryOphthalmology Department, Faculty of Medicine, Alexandria University, 311, Horeya Avenue, Sporting, 10th Floor, App 1004, Alexandria, Egypt.
Amr Ahmed SaidOphthalmology Department, Faculty of Medicine, Alexandria University, 311, Horeya Avenue, Sporting, 10th Floor, App 1004, Alexandria, Egypt.
Ihab Mohamed OsmanOphthalmology Department, Faculty of Medicine, Alexandria University, 311, Horeya Avenue, Sporting, 10th Floor, App 1004, Alexandria, Egypt.
Amr Saad BessaOphthalmology Department, Faculty of Medicine, Alexandria University, 311, Horeya Avenue, Sporting, 10th Floor, App 1004, Alexandria, Egypt.
Mohammed Ahmed ElmasryOphthalmology Department, Faculty of Medicine, Port Said University, Port Said, Egypt.
Eman Nabil ElsayedOphthalmology Department, Faculty of Medicine, Alexandria University, 311, Horeya Avenue, Sporting, 10th Floor, App 1004, Alexandria, Egypt.
Nader Hussein Lotfy BayoumiOphthalmology Department, Faculty of Medicine, Alexandria University, 311, Horeya Avenue, Sporting, 10th Floor, App 1004, Alexandria, Egypt. naderbayoumi@yahoo.com.ORCID http://orcid.org/0000-0002-3140-5073

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo report on the corneal biomechanical characteristics, namely the corneal hysteresis (CH), corneal resistance factor (CRF), as well as the intraocular pressure (IOP) goldman compensated (IOPg), and the cornea compensated (IOPcc), using the ocular response analyzer (ORA) in different age groups in a cohort of normal individuals from the second decade to the seventh decade and beyond. PATIENTS AND

methodsThe study was a cross-sectional survey conducted on 997 eyes of 508 normal individuals presenting for a routine ophthalmic examination at Alexandria Main University Hospital in Alexandria University, Alexandria, Egypt. The study subjects were age stratified into decades (10-20, 21-30, 31-40, 41-50, > 50) and the ORA parameters (CH, CRF, IOPg, IOPcc) reported and stratified. Correlations were sought between the ORA parameters and the age, gender, and laterality.

resultsThe study was conducted on 997 (502 right) eyes of 508 (234 males) normal individuals. The mean ± SD ages of the study groups were 14.7 ± 3.2, 25.9 ± 3.0, 35.3 ± 2.8, 44.6 ± 2.9, and 61.1 ± 7.7 years. The mean ± SD of the CH in the study groups were 10.9 ± 2.4, 9.8 ± 1.5, 9.8 ± 1.4, 9.7 ± 1.7, and 9.5 ± 1.6 mmHg and of the CRF were 10.9 ± 2.4, 9.5 ± 1.7, 9.4 ± 1.8, 9.6 ± 1.9, and 9.6 ± 1.8 mmHg. A statistically significant negative correlation was found between age and each of CH and CRF. IOPcc demonstrated a fairly constant trend in the different age groups whereas IOPg demonstrated an initial decline followed by a gradual rise over time.

conclusionThe corneal biomechanical properties CH and CRF decrease with age. IOPg and IOPcc change minimally with age.

Indexed as

AdolescentAdultAge FactorsAgingChildCorneaCross-Sectional StudiesElasticityFemaleHumansIntraocular PressureMaleMiddle AgedReference ValuesRefraction, OcularYoung AdultBiomechanicsCorneaHysteresisIOPResistance factor

Identifiers

PMID31916064

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.