Gas tamponade is sometimes necessary after vitrectomy. Accurate measurement of intraocular pressure(IOP) in gas-filled eye is important, but is hard to get in operating table, because of lack of a good measuring device. Schiotz tonometry is the only possible method, but it usually gives a lower value than real, because gas-filled eye has a greater compressibility. But if the Schiotz tonometry can give a consistant value in relation to the real value, one can assume a true IOP by simply converting the value, and it will help the vitrectomy surgeon. Vitrectomy with or without lensectomy were done in 7 pigmented rabbits, and fluidair exchange were done at the end of the surgery. Intraocular pressure was monitored by an air infusion system, and true IOP was measured by a transducer from the anterior chamber. Schiotz tonometry was done ar each 5mmHg IOP level, and the values were compared. Schiotz tonometry always gave a lower pressure, and the discrepancy seemed to be greater in aphakic eye, and when the heavier plunger weight were used. Conversion equation was suggested, and their reliability was discussed.
Anterior Chamber ; Intraocular Pressure* ; Manometry ; Operating Tables ; Rabbits ; Transducers ; Vitrectomy*

The patient was a 7 months old Korean girl, who was admitted to Department of Ophthalmology of the Seoul National University Hospital, with 6 months history of the left eyelid swelling and exophthalmos. Visual acuity and ocular movement were unaffected. Orbit CT revealed 1.5x.5 cm sized well circumscribed intraconal mass in the left retrobulbar space with pressure erosion of adjacent bone. At surgery, the mass was pinkish gray and firm, and was adherent to adjacent tissue. The whole mass could not be removed, and a local excision was done.

No abstract available.
Behcet Syndrome*

No abstract available.
Behcet Syndrome*

Advanced glycation end-product(AGE)is known as a factor causing diabetic retinopathy, but little is known about its effect on the function of outer blood-retinal barrier. To test whether AGE can increase the permeability of outer blood-retinal barrier, we injected glycated albumin into white rabbit eyes and observed the change of the fundus and of the outer blood-retinal barrier permeability. The rabbit retina in medullary ray was thickened in AGE-injected eyes. Intravenously injected microperoxidase, tracer molecule, was found in outer sensory retinal layer and outside of the retinal pigment epithelium in AGE-injected eyes. These results suggest that intraocularly injected AGE can increase the outer blood-retinal barrier permeability.
Blood-Retinal Barrier* ; Diabetic Retinopathy ; Permeability ; Retina ; Retinal Pigment Epithelium ; Retinaldehyde

Experimental melanin-induced uveitis[EMIU]was induced in Lewis rats to investigate the mechanisms of the tissue destruction and spontaneous turning off of the endogenous uveitis. The eyes were enucleated serially, and immunohistochemistry, TUNEL stains, and flow cytometry were performed. The major infiltrating inflammatory cells were CD4 T cells in the uveal tissue of EMIU. Apoptosis of these cells has occurred and progressed throughout the inflammatory period in EMIU eyes. Most TUNEL positive cells revealed CD4 positive. These results suggest that apoptotic cell death occurred primarily in the infiltrating inflammatory cells not in the tissue cells of the eye and the apoptosis of CD4 T cells may play a key role in the spontaneous turning off mechanism of intraocular inflammation in EMIU.
Animals ; Apoptosis* ; Cell Death ; Coloring Agents ; Flow Cytometry ; Immunohistochemistry ; In Situ Nick-End Labeling ; Inflammation ; Rats ; T-Lymphocytes ; Uveitis*

PURPOSE: This study is to evaluate the visual prognosis and the frequency of the reoperation according to the refractive power. METHODS: We retrospectively reviewed the medical records of the 19 eyes of 19 patients with retinal detachment caused by macular hole. Patients were classified into 2 groups based on their refractive power, the high myopia group; six patients with -6 diopters or more, and the non-high myopia group; 13 patients with less than -6 diopters. The mean refractive power was -13.4 diopters in high myopia group and+0.19 diopters in non-high myopia group. All patients had vitrectomy and fluid-gas exchange at first operation and silicone oil injection was performed in cases with recurred retinal detachment after 2nd operation. RESULTS: The retina was successfully reattached in all of the 19 eyes and reoperation was needed for achieving retinal reattachment in 4 eyes (21.1%). Three eyes of high myopia group (50%) and one eye of non-high myopia group (7.3%) were reoperated and 2 eyes in high myopia group needed silicone oil injection. Non-high myopia group showed improved visual acuities as compared with preoperative visual acuity (P<0.05, paired t-test). At the last follow up, macular hole was reopened in 3 eyes (15.8%) but the retina was not detached and the 3 eyes showed worse visual acuities than the others with closed macular hole. CONCLUSIONS: Accordingly, the high myopia group had higher incidences of reoperation and worse visual outcome and only one third of the high myopia group needed silicone oil injection, even though these patients may not need silicone oil injection at the first operation.
Follow-Up Studies ; Humans ; Incidence ; Medical Records ; Myopia ; Prognosis* ; Reoperation ; Retina ; Retinal Detachment* ; Retinal Perforations* ; Retinaldehyde* ; Retrospective Studies ; Silicone Oils ; Visual Acuity ; Vitrectomy

To evaluate effects of the topical administration of non-steroidal antiinflammatory drug on anterior uveitis, suprofen eye drop was instilled into the left eye of 10 pigmented rabbits and then experimental anterior uveitis was induced by injecting 750 mocro gram/kg endotoxin of Shigella flexneri serotype 1A into their peritoneal cavities. The pupillary diameters were measured, and cell and flare gradings were recorded in 20 eyes of 10 rabbits for one week at an interval of 12 hours for the first day and then daily. Differences between the treatment and control groups were investigated. All the above parameters showed greatest changes at 12 or 24 hours after the injection of endotoxin and became normal by one week. The treatment and the control groups demonstrated statistically significant difference at 12 hours, day 1, and day 2 as for pupillary diameter and at day 1 and day 2 as for cell and at 12 hours and day 1 as for flare. Thus, it is concluded that prostaglandin plays a role in miosis and the appearance of inflammatory cells and flare in anterior uveitis and the topical administration of non-steroidal anti-inflammatory drug can alleviate signs of anterior uveitis. The specific relationship between leucotriene B4 and polymorphonuclear leucocytes influx was not demonstrated.
Administration, Topical ; Miosis ; Rabbits ; Shigella flexneri ; Suprofen ; Uveitis, Anterior*

PURPOSE: To investigate the clinical features of Korean patients with sarcoid uveitis. METHODS: The medical records of patients with endogenous uveitis who were recruited from the uveitis clinic at Seoul National University Hospital were reviewed. Sex, age at presentation, ocular symptoms and signs, treatment, complications, and the rate of recurrence were analyzed. RESULTS: Of 440 patients with endogenous uveitis, 31 (7.1%) with sarcoidosis were included. The mean age at onset was 54.5 years. Sarcoidosis patients with uveitis tended to be older than those without uveitis (44.1 years). Uveitis was the primary manifestation of sarcoidosis in 16 of 31 patients (51.6%). Anterior uveitis was the most common in terms of the anatomic location of inflammation (54.8%), and posterior involvement (38.7%) was not rare. Systemic corticosteroid therapy was administered to 28 patients (90.3%). Five patients (16.1%) received corticosteroids combined with immunosuppressive agents. CONCLUSIONS: Sarcoid uveitis is not a rare etiology of endogenous uveitis. Topical or systemic corticosteroids could control inflammation in most cases, but immunosuppressive agents are needed in a small percentage of patients. Steroids combined with immunosuppressive agents can prevent severe visual losses in such patients.
Adrenal Cortex Hormones ; Humans ; Immunosuppressive Agents ; Inflammation ; Medical Records ; Recurrence ; Sarcoidosis ; Steroids ; Uveitis ; Uveitis, Anterior

PURPOSE: To evaluate the expression of chemokine and chemokine receptors in the aqueous humor (AH) of patients with recurrent anterior uveitis (AU) in terms of HLA-B-27-association. METHODS: Patients with endogenous uveitis were recruited from the uveitis clinic at Seoul National University Hospital. AH and peripheral blood (PB) were obtained from each patient. The expression of chemokine receptors in T-cells from AH and PB was measured using flow cytometric analysis. Interleukin (IL)-8, interferon-gammainducible protein (IP)-10, and regulated-on-expression, normal T-cell expressed and secreted (RANTES) levels of PB and AH were measured. The expression of chemokine receptor and chemokine levels in PB and AH were compared between HLA-B27-associated AU and idiopathic AU patients. RESULTS: Seventeen patients with HLA-B27-associated AU, 14 patients with idiopathic AU and 5 healthy controls were included in this study. IL-8 and IP-10 levels of AH were shown to be increased more than in PB, and intraocular concentrations of IL-8 and IP-10 were higher in patients with HLA-B27-associated AU than in idiopathic AU patients. RANTES levels in AH were significantly lower than in PB for all groups. In all groups, the expression of chemokine receptor in AH increased more than in PB. CONCLUSIONS: The results from this study show chemokine may play an important role in inflammation in patients with AU. This implies that the chemokine environment may be different in terms of HLA-B-27-association.
Aqueous Humor ; Chemokine CCL5 ; Humans ; Inflammation ; Interleukin-8 ; Interleukins ; Receptors, Chemokine ; T-Lymphocytes ; Uveitis ; Uveitis, Anterior