Although it is well known that ultraviolet and short wavelength visible rays are harmful to the human lens and the retina, consumers still tend to select sunglasses on the basis of fashion rather than protective quality. In order to provide guidelines for selecting appropriate sunglasses, we studied the mechanism of phototoxic damage and UV protective quality of commonly used sunglasses. Commonly used sunglasses were chosen by random sampling, and their UV transmittance was examined by spectrophotometer using neutral density filter method. UV transmittance was shown to be 3.0% to 40.8% and there was no significant relationship between UV transmittance and the tint or darkness of the sunglasses.
Darkness ; Humans ; Retina

Sjogren's syndrome is a systemic disorder and characterized by keratoconjunctivitis sicca, xerostomia, and connective tissuedysfunction(arthritis). A 42 year-old Korean iemalehad progressive loss of visual acuity in both eyes. In addition she has dry eyes, dry mouth and arthritis of 8 years duration. Clinical findings include cornea punctate, filamentary karatitis and decreased lacrimal secretions of both eyes. A diagnosis of Sjogren's syndrome was made. The karatoconjunctivitis siccawas treated with artificial tear and soft contact lens.
Adult ; Arthritis ; Contact Lenses, Hydrophilic ; Cornea ; Diagnosis ; Humans ; Keratoconjunctivitis Sicca ; Mouth ; Sjogren's Syndrome* ; Tears ; Visual Acuity ; Xerostomia

Prisms have been used as tools with which to treat and diagnose many diseases in strabismology. But, because of prismatic distortion and dispersion, the visual acuities are declined. The purpose of this study is to show the relationship between prismatic effect and visual acuity degradation. Visual acuities were measured through a series of prisms of CR-39 to quantify the blur induced by prism. The mean visual acuities of myopias and amblyopias(with or without correction), and emmetropias were reduced as prism diopters were increased. The declines were linear. There was no significant difference among the declines of visual acuities of each group. Whenever to prescribe prisms and to test with prisms, we should remind that prisms could reduce visual acuities.
Emmetropia ; Myopia ; Visual Acuity*

On this study, silicone intubation was performed for punctal stenois in 10 patients(group 1), incomplete nasolacrimal duct obstruction in 47 patients (group 2), and complete nasolacrimal duct obstruction in 18 patients(group 3) in adults. Silicone tube was removed between 3-6 months(mean 5.7 months) after intubation. Mean follow-up period of 9.5 months, 9 patients(90%)in group 1,39 patients(83%)in group 2,and 8 patients(44%) in group 3 showed no epiphora, and 1 patient(10%)in group 1, 8 patients (17%) in group 2, and 4 patients(22%) in group 3 showed intermittent epiphora. 6 patients(33%) in group 3 showed persistent epiphora. In summary, silicone intubation can be an alternative to dacryocystorhinostomy in selected adult patients who have punctal stenosis and incomplete obstruction of nasolacrimal duct system. It is safe, and less traumatic with high success rate in these patients.
Adult* ; Constriction, Pathologic ; Dacryocystorhinostomy ; Follow-Up Studies ; Humans ; Intubation* ; Lacrimal Apparatus Diseases ; Nasolacrimal Duct* ; Silicones*

Although the results of foldable intraocular lens are generally excellent, there are several complications. After cataract surgery with silicone lens, the patients with vitreoretinal surgery using silicone oil have not only visual acuity decrease, but also visual abberations such as halos and rainbow patterns. To report a newly defined complication, we studied the silicone lens-silicone oil interaction. The nonimplanted ilicone, acryl and PMMA lens, ten cases each, had been incubated in silicon oil at 36C for 9 months. After removal from the oil, each lens was examined and photograp hed by scanning electron microscopy every week. Appearance of lens surface and degree of adherence of the silicone oil to each IOL`s optic were estimated. Oily residue on the PMMA and acryl lens was removed easily and shown clear surface. In case of silicone lens, presence of distinct film or coating of oil was shown on the surface of both the optic and haptic component of IOL`s. They could not be removed with mechanical pressure with injected balanced saline solution and the oily residue remained strongly adherent to the optic surface. After 9 weeks, gelly-like adherence was appe ared on the silicone lens surface. As a result, the use of silicone IOL`s in patients with current vitreoretinal disease or those who are at high risk for future vitreoretinal disease that may require silicone oil as part of the therapy should be reconsidered.
Cataract ; Humans ; Lenses, Intraocular ; Microscopy, Electron, Scanning ; Polymethyl Methacrylate ; Silicone Oils* ; Sodium Chloride ; Visual Acuity ; Vitreoretinal Surgery

Estimation of subjective visual acuity depends on the test type, size of object, illumination, distance, position of eyeball and head, and shape of palpebral fissure. The purpose of this study is to observe discrepancy between the correct subjective visual acuity obtained in ideal proper condition and the subjective visual acuity obtained by any means of squeezing, turning eyeball or head in refractive errors: myopia, hyperopia and astigmatism. The results of this study were as follow: 1. Visual acuity with squeezing was better than normal visual acuity in all refractive errors. 2. Discrepancy between normal visual acuity and visual acuity with squeezing was the greatest in the myopia: Visual acuity with squeezing was the best in the myopia. Better visual acuity with squeezing was shown in the compound myopic astigmatism and next in the simple myopic astigmatism. The differance between those two kinds of visual acuities was not noticeable in the hyperopia and mixed astigmatism. 3. Discrepancy between normal visual acuity and visual acuity with squeezing was more in against-the-rule astigmatism than in with-the-rule astigmatism: Visual acuity with squeezing was better in against-the-rule astigmatism than in with-the-rule astigmatism. This study have shown that visual acuity should be measured not only in proper condition of test but also in proper position of a patient with refractive error, especially with myopia.
Astigmatism ; Head ; Humans ; Hyperopia ; Lighting ; Myopia ; Refractive Errors* ; Visual Acuity*

PURPOSE: To determine the incidence of after cataract. following inserting foldable IOL (silicone or hydrophilic acryl IOL) after phacoemulsification. METHODS: Patients who were diagnosed with senile cataract and had undergone phacoemulsification and foldable IOL (silicone or hydrophilic acryl IOL) insertion were included. Among the respective 80 and 82 subjects, we conducted a prospective study on 51 subjects with silicone IOL and 52 with hydrophilic acryl IOL without complications such as operative posterior capsular rupture, postoperative macular edema and endophthalmitis. We measured the best corrected visual acuity and the development of posterior capsular opacity in 1day, 1month, 3months, 6months, 1year after surgery. RESULTS: The incidence of after catatract was 19.5% (10eyes) in silicone-IOL group and 3.8% (2eyes) in hydrophilic acryl IOL group. Values in two groups showed statistically significant difference. CONCLUSIONS: The incidence of after cataract was lower in hydrophilic acryl IOL group than in silicone IOL group.
Cataract ; Endophthalmitis ; Humans ; Incidence* ; Macular Edema ; Phacoemulsification ; Prospective Studies ; Rupture ; Silicones* ; Visual Acuity

Pterygium is a common surgical ocular disease which recurs frequently. Various different techniques have been developed for the successful surgical treatment of pterygium and among them, autograft transplantation is known as the best successful surgical method. For the prevention of recurrence, the corneal epithelium must heal before the fibrovascular tissue grows and reaches to limbus. For this, we have believed that limbal transplanta- tion is more suitable than conjunctival transplantation. We had performed limbal-conjunctival autograft trasplata- tion for 52 patients with primary pterygia whose age was under 40 years old,or whose pterygia had involved above 5mm beyond limbus and had shown diffuse subconjunctival fibrovascular tissue. The recurrence rate was 1.9%and therewere no complications and no surgical problems. Therefore,we recommend this surgical technique as a safe and effective method of treating primary pterygia with the risk factors of recurrence.
Autografts* ; Epithelium, Corneal ; Humans ; Pterygium* ; Recurrence ; Risk Factors

We compared the pain produced during different phases of phacoemulsification cataract surgery using a scleral pocket incision under pinpoint anesthesia with that under intracameral anesthesia. This prospective study comprised each 100 cataract patients who had no complications influencing the degree of pain during surgery. Patients were asked about pain immediately after each phase and pain occurring during each phase was measured using 4 step verbal scale(from 0 to 4). In both anesthesia,conjunctival reposition was the most painful.Pinpoint injection was statistically significantly more painful than induction of intracameral anesthesia.The pain score during conjunctival reposition and at 1hr after surgery were significantly higher under intracameral anesthesia than under pinpoint, but during most of phases under both anesthesia,the pain score was relatively low. Intracameral anesthesia is easy,safety and dose not require additional ocular damage during induction of anesthesia,so if combined with topical anesthesia,it is very effective during cataract surgery using scleral pocket incision.
Anesthesia* ; Cataract* ; Humans ; Phacoemulsification ; Prospective Studies

We measured corneal endothelial cell density of 100 normal eyes of 50 Korean volunteers on central, superior, inferior, nasal and temporal aspect, respectively. Non-contact specular microscopy were used for measurement. The data thus obteined were analyzed according to the following parameters: age, laterality, sex and location(central vs. peripheral). Corneal endothelial cell density showed gradual decrement with age, but no significant statistically differences with laterality and sex. The results showed a large difference in corneal endothelial cell density depending on the location, although they failed to show statistical significant(P>0.05).
Cell Count* ; Endothelial Cells ; Microscopy* ; Volunteers