scholarly journals Evaluation of limbal transplantation in eyes with bilateral severe ocular surface damage secondary to chemical injury

2019 ◽  
Vol Volume 13 ◽  
pp. 383-390 ◽  
Author(s):  
Abdel Hamid El-Hofi ◽  
Hany Ahmed Helaly
Keyword(s):  
Ocular Surface ◽  
Surface Damage ◽  
Chemical Injury ◽  
Limbal Transplantation

scholarly journals Avtologni veznično-limbalni presadek pri enostranskem popolnem pomanjkanju limbalnih epitelnih matičnih celic

2017 ◽  
Vol 86 (7-8) ◽  
Author(s):  
Petra Schollmayer ◽  
Zala Lužnik
Keyword(s):  
Stem Cells ◽  
Surgical Technique ◽  
Corneal Epithelium ◽  
Ocular Surface ◽  
Autologous Transplantation ◽  
Corneal Transplantation ◽  
Epithelial Stem Cells ◽  
Corneal Surface ◽  
Limbal Transplantation

Background: Corneal epithelium is renewed by stem cells (SC) that reside at the corneal limbus. Reduced number of SC or their abnormal function lead to the ocular surface disease called limbal stem cell deficiency (LSCD), characterized by corneal conjunctivalization, vascularization, persistent epithelial defects, chronic inflammation, and loss of vision. In a case of total unilateral LSCD, autologous transplantation of limbal epithelial stem cells (LESC) from the healthy eye is needed. We describe the surgical technique of choice for autologous limbal transplantation, called conjunctival limbal autograft (CLAU) that we combined with amniotic membrane (AM) use. We present the results of CLAU in three patients with total unilateral LSCD due to chemical injury.Methods: Autologous limbal transplantation CLAU begins with the removal of fibrovascular pannus from the diseased corneal surface and the harvesting of two conjunctival-limbal grafts from the healthy eye. The grafts are then transplanted on to the limbal area of the recipient eye. AM is used as a patch to cover the denuded cornea and limbal grafts, as well as a barrier preventing the conjunctival epithelium from encroaching on to the temporal and nasal side of the corneal surface. In the donor eye, AM is used to cover the donor sites. CLAU with the use of AM was performed in 3 patients with unilateral LSCD due to chemical eye injury. In one patient limbal transplantation was combined with symblepharon lysis for entropium repair. In all cases AM was removed 3–6 days postoperatively to assess the growth of new epithelium from the limbal grafts. In all patients the ocular surface was covered with another AM until the cornea was completely epithelized and the new epithelium stable. In one patient the corneal regrafting and cataract removal was performed subsequently.Results: CLAU was successful in 2 patients and partially successful in 1 patient during the follow up. In all cases the growth of new epithelium from the limbal grafts was noted on day 3–6 after CLAU. The cornea was completely epithelized within 2 weeks in 2 patients and after 35 days in one patient. In two patients the corneal epithelium remained clear, smooth and stable during the follow up of 3.5 years and 4 months, respectively. In one patient, uneven epithelium probably representing a mosaic of corneal and conjunctival cells was noted in the central corneal region, where a small corneal ulcer developed 5 months after CLAU. In donor eyes no postoperative complications were noted, the donor sites epithelized within few days.Conclusions: Autologous limbal transplantation according to CLAU surgical technique combined with the use of AM is a successful and safe therapy for restoring corneal surface in total unilateral LSCD after chemical injury. It enables further surgical procedures for restoring the vision such as corneal transplantation and cataract surgery.

Riboflavin Deficiency Induces Ocular Surface Damage

2004 ◽  
Vol 36 (3) ◽  
pp. 156-165 ◽  
Author(s):  
Yumiko Takami ◽  
Huaqing Gong ◽  
Tsugio Amemiya
Keyword(s):  
Ocular Surface ◽  
Surface Damage ◽  
Riboflavin Deficiency

Reduction of Ocular Surface Damage and Bacterial Survival Using 0.05% Povidone-Iodine Ocular Surface Irrigation before Cataract Surgery

2019 ◽  
Vol 62 (3) ◽  
pp. 166-172 ◽  
Author(s):  
Fang Fan ◽  
Zhihua Zhao ◽  
Xiaobin Zhao ◽  
Qingmin Ma ◽  
Kejun Li ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Ocular Surface ◽  
Povidone Iodine ◽  
Surface Damage ◽  
Bacterial Survival ◽  
Surface Irrigation

The Effects of Chemical Injury on the Ocular Surface

Ophthalmology ◽  
1983 ◽  
Vol 90 (6) ◽  
pp. 601-609 ◽  
Author(s):  
Roswell R. Pfister
Keyword(s):  
Ocular Surface ◽  
Chemical Injury

scholarly journals In Vivo Confocal Microscopic Evaluation of Corneal Langerhans Cells in Dry Eye Patients§

2014 ◽  
Vol 8 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Federica Machetta ◽  
Antonio M Fea ◽  
Alessandro G Actis ◽  
Ugo de Sanctis ◽  
Paola Dalmasso ◽  
...  
Keyword(s):  
Confocal Microscopy ◽  
Dry Eye ◽  
Ocular Surface ◽  
Tear Film ◽  
Surface Damage ◽  
Nerve Plexus ◽  
Sjogren Syndrome ◽  
Central Cornea ◽  
Eye Symptoms ◽  
Dry Eye Symptoms

Purpose. To assess inflammatory involvement of cornea in dry eye by means of confocal microscopy, evaluating the presence and distribution of Langherans cells (LCs). Methods: 98 eyes of 49 subjects were enrolled: 18 subjects affected by Sjögren Syndrome Dry Eye (SSDE), 17 with Non-Sjögren Syndrome Dry Eye (NSSDE), 14 healthy volunteeers. Dry eye symptoms, tear film, ocular surface damage and corneal confocal microscopy were analized. Results: A significant increase of LCs density was observed at sub-basal nerve plexus (SSDE = 79 cells/mm2 and NDE = 22 cells/mm2; p = 0,0031) and sub-epithelial nerve plexus (SSDE = 38 cells/mm2 and NDE = 3 cells/mm2; p = 0,0169) in central cornea of SSDE group. An increased number of LCs from the center to the periphery of the cornea was observed, significant only in healthy volunteers group. In dry eye patients there was an increase in LCs density in both peripheral and central cornea with a significant difference between NDE (14,66 cells/mm2) and SSDE (56,66 cells/mm2) only in central cornea (p = 0,0028). In SSDE group, mean density of LCs in central cornea results also superior to NSSDE group (29,33 cells/mm2). There was no correlation between LCs density and dry eye symptoms, tear film deficiency and ocular surface damage. Conclusion: This study demonstrates the activation of an inflammatory and immunological reaction in cornea of NSSDE and SSDE patients. Confocal microscopy can be an important diagnostic tool in evaluation and follow-up of dry eye disease.

scholarly journals Zdravljenje glavkoma in suho oko

2016 ◽  
Vol 85 (4) ◽  
Author(s):  
Barbara Cvenkel
Keyword(s):  
Ocular Surface ◽  
Clinical Signs ◽  
Tear Film ◽  
Signs And Symptoms ◽  
Surface Damage ◽  
Eye Drops ◽  
Film Instability ◽  
Asymptomatic Patients

Patients with glaucoma have increased prevalence of dry eye (DE) compared to age-matched population without glaucoma. Clinical presentation of DE varies among individuals and may significantly reduce quality of life. The onset and deterioration of DE is caused by the toxic-inflammatory effects of preservatives in eye drops, active substance itself, and added, pharmacologically inactive substances or excipients. Ocular surface changes most frequently include superficial punctate keratitis, tear film instability, and allergic reactions. Despite the lack of symptoms, clinical signs may indicate ocular surface damage. Discordance between signs and symptoms is partly caused by decreased corneal sensitivity induced by neurotoxicity of the preservative benzalkonium chloride (BAK). Therefore, it is important to evaluate ocular surface before initiating glaucoma therapy and during follow-up also in asymptomatic patients. Preservative-free and/or BAK-free therapy is indicated in patients with severe DE and allergy to preservatives, and recommended in patients with DE of moderate severity, blepharitis, in symptomatic patients, before filtering surgery to reduce preoperative inflammation, in those with moderate fluorescein staining of grade 2 on Oxford scheme, and reduced tear film break-up time.

Analysis of ocular surface damage and visual impact in patients with primary and secondary Sjögren syndrome

2020 ◽  
Vol 40 (8) ◽  
pp. 1249-1257 ◽  
Author(s):  
Antonio J. Villarreal-Gonzalez ◽  
I. Jocelyn Rivera-Alvarado ◽  
Luis A. Rodriguez-Gutierrez ◽  
Alejandro Rodriguez-Garcia
Keyword(s):  
Ocular Surface ◽  
Surface Damage ◽  
Sjögren Syndrome ◽  
Sjogren Syndrome ◽  
Visual Impact
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