Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation.

Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation. J Ophthalmol. 2019;2019:1964107 Authors: Rateb M, Abdel-Radi M, Eldaly Z, Elmohamady MN, Noor El Din A Abstract Purpose: To evaluate the different IOP readings by Goldmann applanation tonometer (GAT), ICare rebound tonometer, and Tono-Pen in keratoconus patients after MyoRing implantation. To assess the influence of central corneal thickness (CCT) and thinnest corneal location (TCL) on IOP measurements by different tonometers. Setting: Prospective observational study was conducted in two private centers in Egypt from February 2015 to November 2016. Methods: Seventeen eyes of 10 patients suffering from keratoconus and who underwent MyoRing implantation were recruited. All subjects underwent GAT, ICare, and Tono-Pen IOP measurements in random order. Central corneal thickness and thinnest corneal location were assessed by Pentacam. Difference in mean in IOP readings was assessed by T-test. Correlation between each pair of devices was evaluated by Pearson correlation coefficient. The Bland-Altman analysis was used to assess intertonometer agreement. Results: Seventeen eyes (10 patients) were evaluated. The mean IOP reading was 13.9 ± 3.68, 12.41 ± 2.87, and 14.29 ± 1.31 mmHg in GAT, ICare, and Tono-Pen group, respectively. The...
Source: Journal of Ophthalmology - Category: Opthalmology Tags: J Ophthalmol Source Type: research

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We were gratified to see that our recent article has generated so much interest, particularly from some of the foremost thinkers in the field of the posterior cornea. And, we thoroughly agree with the primary point of their letter; namely, that “acute hydrops in keratoconus was a result of a tear in both the Descemet membrane and the pre-Descemet's layer in the background of the abnormal collagen of the corneal stroma in keratoconus.”1 As we learn more about this abnormal collagen structure, it is hoped that more and better treatment o ptions for keratoconus will present themselves.
Source: American Journal of Ophthalmology - Category: Opthalmology Authors: Tags: Correspondence Source Type: research
Purpose: To evaluate the changes in anterior corneal topography induced by short-time wear of scleral contact lenses (SLs) in keratoconic subjects with and without a history of corneal cross-linking (CXL). Methods: Nine keratoconic patients (14 eyes) were fitted with 18.5 mm SLs for optical rehabilitation. Subjects were divided into 2 groups: 7 eyes without a history of CXL (Non-CXL group) and 7 with a history of CXL (CXL group). Corneal topography was performed at baseline and after 2 and 5 hours of lens wear. The differences for simulated flat (Kflat), steep (Ksteep) and maximal (Kmax) corneal curvatures, central co...
Source: Cornea - Category: Opthalmology Tags: Clinical Science Source Type: research
Conclusions: After an average follow-up of 56 months, progression was determined in 20% of the eyes despite appropriate treatment. In the last visit, progression was found to be associated with K1, K2, CCT, TTPC, and age.
Source: Cornea - Category: Opthalmology Tags: Clinical Science Source Type: research
Purpose: To report a case of bilateral and repetitive corneal perforations after corneal cross-linking (CXL) for keratoconus in a woman harboring potentially pathogenic variants in the ZNF469 gene and to characterize the keratoconus phenotype in this woman and her daughter who shared the same ZNF469 mutations. Methods: Clinical characterization of the proband and her daughter followed by sequencing of the genes associated with brittle cornea syndrome, ZNF469 and PRDM5, in both individuals. Results: An Ashkenazi Jewish woman in her sixth decade presented with diffuse corneal thinning and progressive steepening consi...
Source: Cornea - Category: Opthalmology Tags: Case Report Source Type: research
Conclusions: Mini-DMEK could be helpful in patients with larger defects and detachments of DM in very ectatic corneas in the acute phase of corneal hydrops in acute keratoconus. These patients may not be successfully treated by intracameral gas application alone or in combination with pre-Descemetal sutures. Further investigations are needed to identify factors helping to decide on the best surgical approach in hydrops in acute keratoconus.
Source: Cornea - Category: Opthalmology Tags: Techniques Source Type: research
Purpose: To evaluate the safety, efficacy, and stability of topography-guided partial PRK combined with corneal cross-linking (CXL) (the Athens Protocol [AP]) in pediatric patients with keratoconus over a 4-year follow-up period. Methods: This prospective study included 39 keratoconic eyes of 21 patients younger than 18 years with clinical and imaging evidence of keratoconus progression. Partial topography-guided excimer laser ablation in conjunction with high-fluence CXL was performed in all patients according to the AP. Uncorrected distance visual acuity, corrected distance visual acuity, refraction, keratometry, en...
Source: Cornea - Category: Opthalmology Tags: Techniques Source Type: research
Conclusions: MI-OCT guided micropuncture of stromal edema combined with compression sutures and SF6 tamponade is a new therapeutic option in acute corneal hydrops with small Descemet membrane defects.
Source: Cornea - Category: Opthalmology Tags: Techniques Source Type: research
CONCLUSION: Riboflavin-assisted C3R treatment showed promising efficacy in the treatment of PK patients in our population. As the collagen turnover rate of cornea is 2–3 years and the progression of PK is highly variable, we need long-term studies to evaluate the efficacy of C3R over time, requirement of repeat therapy, and safety of repeat cross-linking.
Source: Indian Journal of Pharmacology - Category: Drugs & Pharmacology Authors: Source Type: research
The recently published paper by Parker and associates1 on acute corneal hydrops (ACH) in keratoconus is of interest as it reinforces a novel concept on the mechanism of acute hydrops implicating the pre-Descemet layer (Dua's layer, PDL). This was postulated when the first evidence of the PDL was provided2 and clinically substantiated by Yahia Ch érif and associates,3 when they showed that approximation of the torn PDL with mattress sutures without Descemet membrane (DM) leads to rapid resolution of ACH.
Source: American Journal of Ophthalmology - Category: Opthalmology Authors: Tags: Correspondence Source Type: research
Conclusion: Keratoconus shows significant meibomian gland dropout and distortion that can be recorded by noncontact meibography. Sirius meibography is a simple, cost-effective method of evaluating meibomian gland dropout as a part of the routine refractive examination. PMID: 31275630 [PubMed]
Source: Journal of Ophthalmology - Category: Opthalmology Tags: J Ophthalmol Source Type: research
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