Comparison of specular microscopy and ultrasound pachymetry before and after cataract surgery

López-Miguel, Alberto; Sanchidrián, María; Fernández, Itziar; Holgueras, Alfredo; Maldonado, Miguel J.

doi:10.1007/s00417-016-3537-1

Cited by 11 publications

(7 citation statements)

References 25 publications

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“…[ 9 ] However, there are a very few studies on CCT measurement in patients with corneal edema. [ 10 11 12 13 ] Techniques that are used in practice to evaluate corneal edema include slit-lamp biomicroscopy, UP, SM, ASOCT, corneal tomography (Orbscan II, Sirius, Pentacam, etc. ), and in vivo confocal microscopy.…”

Section: Discussionmentioning

confidence: 99%

Comparison of central corneal thickness in corneal edema by ultrasound pachymetry, specular microscopy, and anterior segment optical coherence tomography

Artuç

Batur²

2023

Saudi Journal of Ophthalmology

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PURPOSE: The purpose of this study was to compare ultrasound pachymetry Ultrasound pachymetry (UP), specular microscopy (SM), and anterior segment optical coherence tomography (ASOCT) in the measurement of central corneal thickness (CCT) in cases of corneal edema before and after uncomplicated phacoemulsification. METHODS: Preoperative pachymetric measurements were performed in all patients before cataract surgery. Sixty -seven patients who developed corneal edema after routine faoemulsification surgery were included in the study. CCT measurements were made the day before surgery and on the 1 st , 7 th , and 14 th days after surgery. Correlation and agreement between the devices were quantified with the intraclass correlation coefficient (ICC), limits of agreement, and Bland–Altman plots. RESULTS: The mean age of the patients was 70.99 ± 9.56 (36–92) years. While CCT could be measured in all eyes with ASOCT after surgery, the number of eyes measured with UP and SM were 24 (11.7%) and 27 (16.1%), 55 (82.1%) and 52 (77.6%), and 46 (88.8%) and 45 (86.9%) on postoperative days 1, 7, and 14, respectively. ICC values between UP and SM, UP and ASOCT, and SM and ASOCT, respectively, were: preoperative 0.91, 0.94, and 0.92; 1 st postoperative day 0.93, 0.86, and 0.93; 7 th postoperative day 0.94, 0.85, and 0.96; and 14 th postoperative day 0.95, 0.92, and 0.96. CONCLUSION: In all eyes with corneal edema, CCT measurements can be taken with ASOCT; however, in some cases, CCT measurements with SM and UP cannot be taken. However, there is a good correlation between measurements taken with these devices.

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Section: Discussionmentioning

confidence: 99%

Comparison of central corneal thickness in corneal edema by ultrasound pachymetry, specular microscopy, and anterior segment optical coherence tomography

Artuç

Batur²

2023

Saudi Journal of Ophthalmology

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“…Stiče se utisak ukoliko bi smo kontrolisali naše ispitanike 3-6 meseci posle hirurškog tretmana da bi dobili vrednosti koje bi bile slične preoperativnim, kao što je to slučaj sa studijom Lopez-Miguel A. [23] Na osnovu dobijenih vrednosti u ovoj prospektivnoj studiji, procenjujemo da praćenje kornealne debljine ima obavezno mesto u observaciji pacijenata nakon operacije katarakte. Utvrdili smo da nema razlike u preoperativnom merenju samo između grupa bez glaukoma i glaukoma sa otvorenim uglom.…”

Section: Statističke Metodeunclassified

The influence of phacoemulsification on corneal oedema in patients with glaucoma

Bogosavljević¹,

Marjanović²,

Gašić³

et al. 2018

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Uvod: Dijagnoza glaukoma se bazira na sagledavanju više faktora, kao što su povišen intraokularni pritisak (IOP), oštećenje optičkog diska i specifični defekt odnosno ispad vidnog polјa. Evaluacija integriteta endotela rožnjače i praćenje kornealne debljine je nezaobilazno u toku preoperativne pripreme za fakoemulzifikaciju. Ovi podaci su od velikog značaja za kasniji tretman i praćenje ranih i kasnih postoperativnih komplikacija. Cilj ovog istraživanja je bio da se ustanovi centralna debljina rožnjače neposredno pre i posle operacije katarakte kod pacijenata sa primarnim glaukomom (sa otvorenim i zatvorenim uglom), a upoređujući ih sa pacijentima koji nemaju dijagnostikovan glaukom. Materijal i metode: Prospektivnom studijom obuhvaćeno je ukupno 159 ispitanika kojima je izvršena operacija katarakte metodom fakoemulzifikacije sa implantacijom intraokularnog sočiva u zadnju komoru na Klinici za Očne bolesti, u Kliničkom centru Srbije u Beogradu tokom 2017. i 2018. godine. Pacijenti su u preoperativnoj pripremi razvrstani u dve grupe. Prvu grupu sa primarnim glaukomom činilo je 71 ispitanik, od toga sa glaukomom otvorenog ugla 41, a sa glaukomom zatvorenog ugla 30. Drugu grupu su činili osobe koje nisu imali dijagnostikovan glaukom, njih 88. Centralna debljina rožnjače je merena uz pomoć ultrazvučnog pahimetra. Merenja su bila izvršena pre operacije, 24 časa, 10 i 30 dana nakon operacije, vodeći računa o tome da sva budu obavljena u isto doba dana. Rezultati: Između pacijenata bez glaukoma (BG), primarnog glaukoma otvorenog ugla (POAG) i primarnog glaukoma za-2 tvorenog ugla (PACG), postoji statistički značajna razlika medijana godina starosti (χ = 10,102; DF=2; p=0, 006). Između 2 posmatranih grupa bilo je statistički značajne razlike u vrednostima izmerenih preoperativno (χ = 10,265; DF=2; p=0,006). Između posmatranih grupa nije bilo statistički značajne razlike u vrednostima izmerenih u prvom postoperativnom danu 2 2 (χ = 4,364; DF=2; p=0,099), kao ni u desetom postoperativnom danu (χ = 3,250; DF=2; p=0,197), i 30 dana nakon operacije 2 (χ = 1,427; DF=2; p=0,490). U svakoj od grupa pojedinačno uočena je pojava edema odn. veoma statistički značajna razlika u prvom i desetom postoperativnom danu. Statistički značajna razlika prisutna je i 30 dana nakon operacije, ali daleko manja u odnosu na rani postoperativni period. Zaključak: Na osnovu dobijenih vrednosti u ovoj prospektivnoj studiji, procenjujemo da praćenje kornealne debljine ima obavezno mesto u observaciji pacijenata nakon operacije katarakte. Utvrdili smo da nema razlike u preoperativnom merenju samo između grupa bez glaukoma i glaukoma sa otvorenim uglom. Merenja obavljena u prvom, desetom u tridesetom danu se ne razlikuju po grupama, ali je primećena restitucija edema u tridesetom danu kod svih posmatranih grupa.

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“…However, corneal edema delays early vision improvement after surgery [ 1 – 3 ]. The transient post-operative corneal swelling that commonly occurs after phacoemulsification is probably the result of damage to endothelial cells during surgery [ 4 , 5 ] due to mechanical or chemical injury,—including larger corneal incision sizes [ 6 , 7 ], direct mechanical trauma, the effect of ultrasound energy and the irrigating solution [ 2 ]-, subsequent inflammation or infection, pre-existing endothelial disease [ 4 , 5 , 8 – 10 ] or systemic diseases, such as diabetes [ 11 ]. Usually, corneal edema is reversible, but recovery times as different as one week [ 7 , 12 , 13 ], four weeks [ 12 , 14 , 15 ], 60 days [ 15 , 16 ], six months [ 5 , 17 ] or even one year after surgery [ 18 ] have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Slit-lamp examination is extensively used [ 20 ] although it is subjective, depends on the practitioner expertise and may pass as normal corneas with subclinical edema. To overcome these problems, different objective methods have been proposed, including specular microscopy and in vivo confocal microscopy for endothelial morphology [ 8 , 21 ], pachymetry for central corneal thickness (CCT) [ 8 , 21 , 22 ], ocular coherence tomography (OCT) [ 6 , 12 ], and densitometry using a rotating Scheimpflug camera [ 4 ]. However, The focus of this literature is on the changes in the cornea, and an analysis of the visual effects of corneal edema and data showing whether these visual effects are transient or permanent is missing.…”

Section: Introductionmentioning

confidence: 99%

Refractive changes and visual quality in patients with corneal edema after cataract surgery

et al. 2022

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Background To assess visual quality and stabilization of refractive changes in corneal edema patients after cataract surgery, using visual acuity (VA) and contrast sensitivity measurements. Methods Sixty-one eyes were analysed, twenty-three with and thirty-eight without corneal edema. Uncorrected and corrected distance VA (UDVA and CDVA) were determined with an EDTRS chart, the contrast sensitivity function (CSF) under photopic and mesopic illumination conditions with a CVS-1000e chart, clinical refraction, and corneal topography. Measurements were taken preoperatively, 1–2 days, 1 and 3-months after surgery. Clinical refraction was converted to vector notation (M, J0, J45) and SPSS v26.0 was used for data analysis. Results An improvement of VA was observed through the postoperative period; changes between visits were significant for CDVA in both groups and for UDVA in the edema sample. Significant astigmatic changes (J0,J45) between visits were not observed, but M values showed a hyperopic tendency in the edema group and a myopic shift in the control group that did not change between visits, with statistically significant differences between groups. Controls had significantly better contrast sensitivity at high spatial frequencies. Under mesopic conditions, global contrast sensitivity losses were observed in the edema group, which improved between visits in the middle frequency range. Conclusion Corneal edema patients had a significant reduction of CDVA, and frequency-selective sensitivity losses that evidence a visual quality loss. Clinical refraction may improve visual quality, but in edema patients these losses are related to corneal changes, which did not change at three months after surgery.

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Comparison of specular microscopy and ultrasound pachymetry before and after cataract surgery

Cited by 11 publications

References 25 publications

Comparison of central corneal thickness in corneal edema by ultrasound pachymetry, specular microscopy, and anterior segment optical coherence tomography

Comparison of central corneal thickness in corneal edema by ultrasound pachymetry, specular microscopy, and anterior segment optical coherence tomography

The influence of phacoemulsification on corneal oedema in patients with glaucoma

Refractive changes and visual quality in patients with corneal edema after cataract surgery

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