Ioannis Halkiadakis

Dr. Ioannis Halkiadakis

Ophthalmiatrion Athinon, Athens Eye Hospital, Konstadinoupoleos 17 Marousi, 15124 Athens, Greece
orcid

Research Focus & Metrics

Academic Career Length

21Years (2006-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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3 February 2012 in Graefe's Archive for Clinical and Experimental Ophthalmology
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IHIoannis Halkiadakis
Ioannis Halkiadakis
ASAimilianos Stratos
Aimilianos Stratos
GSGeorge Stergiopoulos
George Stergiopoulos
EPEleni Patsea
Eleni Patsea
SSSotiris Skouriotis
Sotiris Skouriotis
GGGerasimos Georgopoulos
Gerasimos Georgopoulos

1 January 2006 in Ocular Immunology and Inflammation
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NMNikos N. Markomichelakis
Nikos N. Markomichelakis
IHIoannis Halkiadakis
Ioannis Halkiadakis
SPSimina Papaeythymiou-Orchan
Simina Papaeythymiou-Orchan
NGNikos Giannakopoulos
Nikos Giannakopoulos
NENikos Ekonomopoulos
Nikos Ekonomopoulos
TKTasos Kouris
Tasos Kouris
To evaluate the safety and efficacy of high-dose intravenous steroid therapy (HDIST) for the acute treatment of vision-threatening serpiginous choroiditis. Retrospective review of the records of five patients with serpiginous choroiditis who were treated with HDIST (1 g methylprednisolone for three days) in addition to their standard immunosuppressive treatment. The visual acuities and improvement of ocular signs after HDIST were evaluated. Twelve episodes of macula-threatening choroiditis in five patients with serpiginous choroiditis were treated during a seven-year period. All patients responded to HDIST with evidence of a decrease in intraocular inflammation immediately after and complete restoration of visual acuity within 10 days of commencing treatment. In one patient, medical intervention was required because of gastric distress. During the follow-up, three out of five patients experienced new attacks and two patients developed subretinal neovascularization. HDIST is effective in controlling severe vision-threatening serpiginous choroiditis and in improving visual function in a short period of time. However, the effect of this treatment in long-term disease control is uncertain.

22 September 2020 in Journal of Glaucoma
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IHIoannis Halkiadakis
Ioannis Halkiadakis
AVAnna Vernikou
Anna Vernikou
VTVasilis Tzimis
Vasilis Tzimis
IMIoannis Markopoulos
Ioannis Markopoulos
KPKorina Popeskou
Korina Popeskou
VKVasilliki Konstadinidou
Vasilliki Konstadinidou
Precis: Patients with glaucoma have reduced and irregular corneal epithelial thickness (CET) even if they do not report symptoms of dry eyes. The reduction of corneal epithelium affects equally the superior and inferior areas of the cornea. Purpose: To evaluate CET parameters by means of anterior segment optical coherence tomography in glaucomatous patients undergoing medical treatment and compare them with CET parameters of controls. Methods: This was a cross-sectional study of 62 patients with primary open-angle or pseudoexfoliative glaucoma (study group) and 62 age-matched controls. Fourier-domain optical coherence tomography (RTVue) with a corneal adaptor module was used in the present study. Τhe pachymetry scan pattern was used to map the cornea and the software generated corneal thickness parameters were recorded. Simple comparisons between groups were performed and the correlations of CET parameters with parameters associated with medication use (treatment duration, number of medications and number of instillations) were assessed. Results: Mean age of the patients was 68±11.9 years in the glaucoma group and 65.5±8.5, years in the control group (P=0.17). Median number of instillations of medication was 2 (range, 1 to 6) for the glaucoma group. Central corneal thickness was 537.6±33.3 in the glaucoma group and 550.8±33.7 in the control group, respectively (P=0.028). The central CET was 48.8.±3.7 μm in the glaucoma group and 53.5±3.7 μm in the control group (P<0.001). Similarly, the average superior (2 to 7 mm) CET and the average inferior (2 to 7 mm) CET were almost equally reduced in the glaucoma group (45±4 vs. 49.6±3.3 μm, P<0.001 and 49±3.9 vs 53.5±3.7, P<0.001, respectively). No CET parameter was correlated with any of the treatment parameters. Conclusions: Patients treated for glaucoma have uniformly reduced corneal epithelial thickness.

20 February 2024 in Journal of Clinical Medicine
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IHIoannis Halkiadakis
Ioannis Halkiadakis
KKKallirroi Konstantopoulou
Kallirroi Konstantopoulou
VTVasilios Tzimis
Vasilios Tzimis
NPNikolaos Papadopoulos
Nikolaos Papadopoulos
KCKlio Chatzistefanou
Klio Chatzistefanou
NMNikolaos N. Markomichelakis
Nikolaos N. Markomichelakis
Glaucoma is a common and potentially blinding complication of uveitis. Many mechanisms are involved alone or in combination in the pathogenesis of uveitic glaucoma (UG). In terms of diagnostic evaluation, the effects of inflammatory activity in the retinal nerve fiber layer may be a source of bias in the interpretation of optical coherence tomography measurements. For the successful treatment of UG, the control of intraocular inflammation specific to the cause or anti-inflammatory treatment, combined with IOP management, is mandatory. The early institution of specific treatment improves the prognosis of UG associated with CMV. The young age of UG patients along with increased failure rates of glaucoma surgery in this group of patients warrants a stepwise approach. Conservative and conjunctival sparing surgical approaches should be adopted. Minimally invasive surgical approaches were proved to be effective and are increasingly being used in the management of UG along with the traditionally used techniques of trabeculectomy or tubes. This review aims to summarize the progress that recently occurred in the diagnosis and treatment of UG.

18 March 2022 in International Journal of Ophthalmology
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AAAthens Eye Hospital Ophthalmiatrion Athinon
Athens Eye Hospital Ophthalmiatrion Athinon
IHIoannis Halkiadakis
Ioannis Halkiadakis
AGAlexandros Gryparis
Alexandros Gryparis
IMIoannis Markopoulos
Ioannis Markopoulos
VKVasiliki Konstadinidou
Vasiliki Konstadinidou
VTVasilios Tzimis
Vasilios Tzimis
AIM: To evaluate the agreement of biomechanically corrected intraocular pressure (b-IOP) and central corneal thickness (CCT) measurements obtained with the updated Corvis ST tonometer versus Goldmann applanation tonometry (GAT) and optical-based corneal pachymetry (OB-CCT) in controls, patients with ocular hypertension (OHT) and primary open angle glaucoma (POAG). Additionally, we examined the differences in corneal deformation parameters provided by the updated Corvis ST among the three groups. METHODS: For each participant, GAT IOP, OB-CCT and measurements with a Corvis ST with updated software were obtained. Bland-Altman analysis was used to assess the agreement between the two measurement methods. RESULTS: A consecutive series of 80 eyes from 80 participants (30 with POAG, 25 with OHT and 25 normal controls) were included in this prospective study. The mean GAT IOP of all eyes was 17.2±3.6 mm Hg, and the mean b-IOP was 15.9±3.7 mm Hg (Spearman's rho=0.767, P<0.001). The 95% limits of agreement (LoAs) ranged from -3.1 mm Hg to 5.5 mm Hg for GAT IOP and b-IOP. b-IOP was not correlated with OB-CCT (Spearman's rho=-0.13 P=0.917). Meanwhile there was a weak positive corelation between OB-CCT and GAT IOP–b-IOP difference (Spearman's rho=0.378, P=0.001). The mean OB-CCT was 549.5±36.4 µm, and the Corvis-CCT was 556.1±41.5 µm (Spearman's rho=0.900, P<0.001). No statistically significant difference in the new indices provided by the updated Corvis ST was detected among the three groups. Compared with control eyes, POAG eyes had a significantly reduced applanation time 2 after adjusting for OB-CCT and GAT IOP (P=0.048). CONCLUSION: Corvis b-IOP and CCT correlate well with GAT IOP and OB-CCT. b-IOP is not affected by CCT, which might be an advantage, especially in thick or thin corneas. Corvis ST yields shorter applanation time 2 measurements in patients with POAG, which might reflect altered corneal viscoelasticity.

20 March 2024 in International Ophthalmology
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IHIoannis Halkiadakis
Ioannis Halkiadakis
TNThomas Ntravalias
Thomas Ntravalias
EKElpida Kollia
Elpida Kollia
KCKlio Chatzistefanou
Klio Chatzistefanou
SKStylianos A. Kandarakis
Stylianos A. Kandarakis
EPEleni Patsea
Eleni Patsea