1.Effect of Experimental Scleral Shortening on Axial Length of the Rabbit Eye.
Han Sang PARK ; Jung Yeal KIM ; Jae Pil SHIN ; Yul Je CHOI ; Si Yeol KIM
Korean Journal of Ophthalmology 2005;19(2):101-105
PURPOSE: To evaluate the change of axial length (AL), intraocular pressure (IOP), and corneal astigmatism after scleral shortening with scleral invagination in the rabbit eye. METHODS: The authors performed scleral shortening (3 mm) with scleral invagination in two groups of 6 eyes each: 180 degrees (group 1) and 360 degrees (group 2). RESULTS: Average AL shortening was more prominent in group 2 (0.5 +/- 0.17 mm) than in group 1 (0.37 +/- 0.29 mm), but the difference was not statistically significant. IOP increased immediately after the procedure and was maintained at a high level through 2 months postoperatively. Induced corneal astigmatism was more prominent in group 1 than in group 2. The difference was statistically significant in group 1 (p< 0.05) but not in group 2. CONCLUSIONS: In the scleral shortening with scleral invagination procedure, a large amount of scleral invagination resulted in more shortening of axial length, but there was more corneal astigmatism in 180-degree invagination of the sclera than in 360-degree. Further research is required to determine the effect of the extent of scleral invagination on the change of these values.
Animals
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Astigmatism/*etiology
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Corneal Diseases/*etiology
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Eye/*pathology
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*Intraocular Pressure
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Postoperative Period
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Rabbits
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Sclera/*surgery
2.Results of vitreous surgery for posterior complications of chronic uveitis.
Korean Journal of Ophthalmology 1994;8(1):20-25
To determine surgical results and predictive factors of final visual acuity, a total of 30 eyes in 30 uveitis patients who underwent vitreous surgery including pars plana vitrectomy were followed for at least 6 months and various preoperative factors and postoperative results were analyzed. Our surgical indications were vitreous opacity, traction retinal detachment, combined rhegmatogenous-traction detachment. Preoperatively detached retina was finally reattached in 15 (83.3%) of 18 eyes. Final visual acuity improved in 19 (63.3%) of 30 eyes, but decreased in 3 eyes compared with the initial acuity. Cystoid macular edema was the main cause of poor visual acuity after surgery. Eyes with good final visual acuity showed relatively normal electroretinograms before surgery, but the relationship between them was not statistically significant. Duration of postoperative inflammation affected final visual acuity significantly. These results suggest that chronic uveitis patients with vitreoretinal complications can be managed by vitreous surgery with good anatomic and functional results.
Adolescent
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Adult
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Child
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Chronic Disease
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Eye Diseases/etiology/surgery
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Female
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Humans
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Male
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Middle Aged
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Prognosis
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Retinal Diseases/etiology/*surgery
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Uveitis/*complications
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Visual Acuity
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*Vitrectomy
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Vitreous Body/*surgery
3.Results of vitreous surgery for posterior complications of chronic uveitis.
Korean Journal of Ophthalmology 1994;8(1):20-25
To determine surgical results and predictive factors of final visual acuity, a total of 30 eyes in 30 uveitis patients who underwent vitreous surgery including pars plana vitrectomy were followed for at least 6 months and various preoperative factors and postoperative results were analyzed. Our surgical indications were vitreous opacity, traction retinal detachment, combined rhegmatogenous-traction detachment. Preoperatively detached retina was finally reattached in 15 (83.3%) of 18 eyes. Final visual acuity improved in 19 (63.3%) of 30 eyes, but decreased in 3 eyes compared with the initial acuity. Cystoid macular edema was the main cause of poor visual acuity after surgery. Eyes with good final visual acuity showed relatively normal electroretinograms before surgery, but the relationship between them was not statistically significant. Duration of postoperative inflammation affected final visual acuity significantly. These results suggest that chronic uveitis patients with vitreoretinal complications can be managed by vitreous surgery with good anatomic and functional results.
Adolescent
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Adult
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Child
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Chronic Disease
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Eye Diseases/etiology/surgery
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Female
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Humans
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Male
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Middle Aged
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Prognosis
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Retinal Diseases/etiology/*surgery
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Uveitis/*complications
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Visual Acuity
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*Vitrectomy
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Vitreous Body/*surgery
4.Intravitreal cysticercosis.
Man Seong SEO ; Je Moon WOO ; Yeoung Geol PARK
Korean Journal of Ophthalmology 1996;10(1):55-59
Examination of a 36-year-old man with naked visual acuity of 20/20 revealed a floating, conspicuous cyst of Cysticercus cellulosae in the vitreous cavity of the right eye. A vitreous traction band from the vitreous base and the optic disc was connected to the lodging bulb of the cyst. In the superonasal area, an ovoid retinal break surrounded by a white retinal lesion with two elliptical retinal hemorrhages was found, and this seems to be the previous lodging site of the cyst. A pars plana vitrectomy was performed to remove the parasite, and laser photocoagulation was carried out around the retinal break. Four months after the operation, the patient was satisfied with naked visual acuity of 25/20 without any complication in the affected eye.
Adult
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Animals
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Cysticercosis/*diagnosis/physiopathology/surgery
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Cysticercus/*isolation & purification
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Eye Diseases/diagnosis
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Eye Infections, Parasitic/*diagnosis/physiopathology/surgery
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Humans
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Laser Coagulation
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Male
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Retinal Hemorrhage/etiology/surgery
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Retinal Perforations/etiology/surgery
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Visual Acuity
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Vitrectomy
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Vitreous Body/*parasitology/surgery
5.OCT-guided Hyaloid Release for Vitreomacular Traction Syndrome.
Eun Jee CHUNG ; Young Ju LEW ; Hyo LEE ; Hyoung Jun KOH
Korean Journal of Ophthalmology 2008;22(3):169-173
PURPOSE: To evaluate the usefulness of OCT retinal mapping in determining the configuration of a vitreomacular adhesion and selecting a meridian for entry into the subhyaloid space in patients with vitreomacular traction syndrome. METHODS: Six consecutive patients (6 eyes) with vitreomacular traction syndrome underwent vitrectomy with peeling of posterior hyaloid. Ocular coherence tomography (OCT) retinal mapping was performed preoperatively. Access to the subhyaloid space was made by creating an opening with a 25 gauge needle at a location where the detached posterior hyaloid membrane was farthest from the retinal surface. The location was selected based on six preoperative meridional OCT scans. The posterior hyaloid was then gently peeled off in a circular fashion around the fovea with a micropick. Visual acuity and foveal thicknesses were measured before the operation and 3 months afterwards. RESULTS: After the operation, visual acuity improved and central macular thicknesses were reduced significantly in all six patients. The best corrected visual acuity improved from 0.4 to 0.75 with a mean increase by 3.5 lines on a Snellen chart 3 months after the operation. The mean foveal thickness was reduced from 406 micrometer to 241 micrometer. The restoration of foveal pit was observed in five patients. Neither intraoperative nor postoperative complications were observed during the follow up period. CONCLUSIONS: An OCT retinal mapping program is a valuable diagnostic tool in understanding the configuration of vitreomacular adhesion and planning the surgical approach for operating on vitreomacular traction syndrome.
Aged
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Eye Diseases/diagnosis/etiology/*surgery
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Female
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Humans
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Male
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Middle Aged
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Retinal Diseases/diagnosis/etiology/*surgery
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Syndrome
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Tissue Adhesions/etiology/surgery
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*Tomography, Optical Coherence
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Visual Acuity
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Vitrectomy/*methods
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Vitreous Body/pathology/*surgery
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Vitreous Detachment/complications
6.A Case of Orbital Abscess following Porous Orbital Implant Infection.
Seung Woo HONG ; Ji Sun PAIK ; So Youl KIM ; Suk Woo YANG
Korean Journal of Ophthalmology 2006;20(4):234-237
PURPOSE: We present a case of orbital abscess following porous orbital implant infection in a 73-year-old woman with rheumatoid arthritis. METHODS: Just one month after a seemingly uncomplicated enucleation and porous polyethylene (Medpor(R)) orbital implant surgery, implant exposure developed with profuse pus discharge. The patient was unresponsive to implant removal and MRI confirmed the presence of an orbital pus pocket. Despite extirpation of the four rectus muscles, inflammatory granulation debridement and abscess drainage, another new pus pocket developed. RESULTS: After partial orbital exenteration, the wound finally healed well without any additional abscess formation. CONCLUSIONS: A patient who has risk factors for delayed wound healing must be examined thoroughly and extreme care such as exenteration must be taken if there is persistent infection.
Prosthesis-Related Infections/diagnosis/*etiology/surgery
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Porosity
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Orbital Implants/*adverse effects
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Orbital Diseases/diagnosis/*etiology/surgery
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Magnetic Resonance Imaging
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Humans
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Follow-Up Studies
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Female
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Eye Enucleation
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Device Removal
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Aged
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Abscess/diagnosis/*etiology/surgery
7.A Case of Epithelial Inclusion Cyst of Iris.
Jin Hae LEE ; Myoung Hee PARK ; Hyun Seung KIM
Korean Journal of Ophthalmology 2008;22(4):259-262
To report on an epithelial inclusion cyst of the iris that was successfully treated with needle aspiration and Ab externo laser photocoagulation. A 6-year-old boy was treated for a 6.0 mm fluid-filled cyst in the anterior chamber of the right eye. Thirteen months previously, he had undergone primary closure of a 6 mm full-thickness corneal laceration. The subsequent cyst was diagnosed as an epithelial inclusion cyst of the iris. His vision decreased to finger-count at 30 cm as the cyst grew over the pupil. We performed needle aspiration of the cyst and Ab externo laser photocoagulation of the cyst wall. The treated lesion was completely removed. The patient's visual acuity recovered to 20/40 without complications. There was no recurrence as determined by slit lamp examination up to 6 months after treatment. Needle aspiration and Ab externo laser photocoagulation can be used to effectively treat epithelial inclusion cysts of the iris.
Biopsy, Fine-Needle
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Child
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Cornea/injuries
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Cysts/etiology/*pathology/surgery
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Epithelial Cells/*pathology
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Eye Injuries, Penetrating/complications/surgery
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Humans
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Iris Diseases/etiology/*pathology/surgery
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Lacerations/complications/surgery
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Laser Coagulation
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Male
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Play and Playthings/injuries
8.Case Reports of Lacrimal Sac Tumors Discovered in Patients with Persistent Epiphora Following Dacryocystorhinostomy.
Ka Hyun LEE ; Sun Hyup HAN ; Jin Sook YOON
Korean Journal of Ophthalmology 2015;29(1):66-67
No abstract available.
Aged
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Biopsy
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Carcinoma, Squamous Cell/diagnosis/*etiology
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Dacryocystorhinostomy/*adverse effects
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Eye Neoplasms/diagnosis/*etiology
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Female
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Humans
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Lacrimal Apparatus/pathology/*surgery
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Lacrimal Apparatus Diseases/diagnosis/*etiology
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*Postoperative Complications
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Tomography, X-Ray Computed
9.Vertical Rectus Muscles Transposition in Large Exotropia with Medial Rectus Muscle Transection Following Endoscopic Sinus Surgery.
Yoonae A CHO ; Sang Hoon RAH ; Myung Mi KIM ; Joo Yeon LEE
Korean Journal of Ophthalmology 2008;22(2):104-110
PURPOSE: To evaluate the effect of transposition procedures on the vertical rectus muscle (VRM) in the patients who underwent a medial rectus muscle (MR) transection after endoscopic sinus surgery (ESS). METHODS: In 4 patients with exotropia (XT) and a lack of adduction after ESS, orbital CT or MRI revealed a complete transection of the midportion of the MR. Full-tendon VRM transposition was performed within 3 months after injury (early surgery) in 2 patients with 40delta XT. Two patients with 70delta and 85delta XT underwent an X-type augmented Hummelsheim procedure, which involved pulling each half-tendon and crossing it through the undersurface of the severed MR to the other end of the MR insertion, concurrently with an ipsilateral lateral rectus (LR) recession 11 months and 36 months after ESS, respectively. The adduction deficits were divided into -1 through to -8. The patients were followed up for more than than 1.5 years. RESULTS: Postoperatively, 3 patients showed orthophoria and no diplopia in the primary position. The adduction deficits improved to -3.5 or -4. One patient who underwent an X-type augmented Hummelsheim procedure showed a residual XT of 25delta. CONCLUSIONS: VRM transposition is effective in correcting a large XT secondary to a MR transection after ESS. When a longstanding large-angle XT with severe contracture of the ipsilateral LR and massive scarring of the adjacent tissues is present, the X-type augmented Hummelsheim procedure coupled with an ipsilateral LR recession had an augmenting effect.
Adult
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Aged
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Endoscopy/*adverse effects
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Exotropia/diagnosis/etiology/*surgery
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Eye Movements
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Female
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Humans
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*Iatrogenic Disease
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Magnetic Resonance Imaging
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Male
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Middle Aged
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Oculomotor Muscles/injuries/pathology/*surgery
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Paranasal Sinus Diseases/*surgery
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Tendon Transfer/*methods
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Tomography, X-Ray Computed
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Vision, Binocular
10.Lysis of vitreous strands with neodymium: YAG laser.
Hungwon TCHAH ; Richard L. LINDSTROM
Korean Journal of Ophthalmology 1990;4(1):34-39
Eighteen eyes with vitreous strands adherent to the corneoscleral wounds of previous cataract surgery were treated with neodymium: YAG laser to lyse those strands. Twelve eyes were treated for management of cystoid macular edema (CME group); six eyes were treated for prophylaxis of possible CME (prophylactic group). In the CME group, visual acuity improved two or more lines in nine eyes (75.0%), and seven eyes had a post laser visual acuity of 0.5 or better (One eye had a pre-treatment visual acuity of 0.5 or better). In the prophylactic group, visual acuity was either maintained at the pre-treatment visual acuity of 0.5 or better. In the prophylactic group, visual acuity was either maintained at the pre-treatment level or improved in five eyes (83.3%) 18 months later following laser treatment. This procedure was complicated by retinal detachment in one case and the elevation of intraocular pressure over 10 mmHg in another case.
Adult
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Aged
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Aged, 80 and over
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Cataract Extraction/adverse effects
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Eye Diseases/etiology/surgery
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Female
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Humans
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*Laser Therapy
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Macular Edema/prevention & control/*surgery
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Male
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Middle Aged
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Visual Acuity
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Vitreous Body/*surgery