• Journal of Korea Multimedia Society
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• v.13 no.8
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• pp.1142-1153
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• 2010

Conjunctival injection is the initial symptom of various eye diseases such as conjunctivitis, keratitis, or uveitis. The quantification of conjunctival injection may help the diagnosis and follow-up evaluation of various eye diseases. The size of the sclera is an important factor for the quantification of conjunctival injection. However, previous manual segmentation is time-consuming.Automatic segmentation is needed to extract the objective region of interest. This paper proposed a method based on the level set algorithm to segment the sclera from an anterior eye image. The initial model of the level set algorithm is calculated using the Lab color space, k-means algorithm and the geometric information. The level set algorithm was applied to the images in which the valley between the eyeball and skin was enhanced using the hessian analysis. This algorithm was tested with 52 images of the anterior eye segment. Results showed that the proposed method performs better than those with the level set algorithm using an arbitrary circle, or the region growing algorithm with color information. The proposed method for the segmentation of sclera may become an important component for the objective measurement of the conjunctival injection.

• Journal of The Korean Ophthalmological Society
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• v.59 no.11
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• pp.1082-1086
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• 2018

Purpose: To report a case of a 60-year-old female with rhegmatogenous retinal detachment, presenting with suprachoroidal hemorrhage after vitrectomy. Case summary: A 60-year-old woman visited our clinic complaining of floaters, flashing, and blurred vision. Best-corrected visual acuity was 0.1 in her left eye, and fundus examination of her left eye revealed macula-involved retinal detachment with a retinal break at the superotemporal quadrant. She underwent cataract surgery, 23-gauge transconjunctival sutureless vitrectomy, and 14% C3F8 gas tamponade under general anesthesia. One hour after anesthesia recovery, she suddenly complained of severe pain in her left eye. The intraocular pressure measured after removal of the pressure patch from her left eye was as high as 58 mmHg. Her ocular pain improved spontaneously within 10 minutes, and the intraocular pressure decreased to 8 mmHg. Fundus examination of her left eye revealed a reddish-brown raised lesion, suggesting suprachoroidal hemorrhage. She was placed in a prone position with a pressure patch over her left eye. Bleeding through the sclerotomy site was observed 1 day after surgery. Subsequently, hemorrhagic choroidal detachment of her left eye continued to decrease without deterioration. Three weeks after surgery, the patient received an intravitreal injection of 100% C3F8 gas into her left eye. At 3 months after surgery, best-corrected visual acuity had improved to 0.8 in her left eye, and the retina was stable. Conclusions: Suprachoroidal hemorrhage may be suspected in a patient complaining of severe ocular pain after vitrectomy.