A Case of Orbital Eccrine Hidrocystoma

Purpose@#To report the first domestic case of orbital eccrine hidrocystoma.Case summary: A 40-year-old man visited our clinic after an orbital mass was discovered in the left eye. Orbital magnetic resonance imaging showed a well-defined 1 cm mass on the superomedial side of the orbit, slightly posterior to the globe. The mass was excised completely without rupture through an incision to the upper eyelid skin. The mass appeared more like a cyst than a hemangioma. The diagnosis of eccrine hidrocystoma was confirmed histopathologically. The patient recovered and there was no recurrence at the 6-month follow-up. @*Conclusions@#Although orbital eccrine hidrocystoma is very rare, it should be included in the differential diagnosis of orbital tumors.

Efficacy and Safety of Letibotulinum Toxin A for the Treatment of Essential Blepharospasm

PURPOSE: To evaluate the efficacy and safety of BOTULAX® in subjects with essential blepharospasm.METHODS: In this study, a total of 250 subjects with essential blepharospasm were enrolled at 15 investigational sites and a total of 220 subjects completed the study. The efficacy and safety were evaluated at weeks 4 and 16 after treatment compared with baseline. In total, 240 subjects were enrolled, treated with the investigational product, and evaluable for the primary efficacy assessment at week 4 after treatment; these subjects were included in the intention-to-treat (ITT) population. With the ITT set as the main efficacy set, efficacy assessment included Jankovic rating scale (JRS), functional disability score, investigator evaluation of global response and quality of life. Safety assessment including the incidence of adverse events was also performed.RESULTS: In terms of the primary efficacy endpoint (i.e., change in JRS total score at week 4 after treatment from baseline [ITT set]), mean change indicated a statistically significant reduction (p < 0.0001) and demonstrated the non-inferiority of the test drug to similar drugs. In terms of the secondary efficacy endpoints, mean change in JRS total score at week 16 after treatment and mean change in functional disability score at weeks 4 and 16 after treatment both exhibited a statistically significant reduction compared with baseline (p < 0.0001 for all). Among the 249 subjects treated with the investigational product in this study, 44 (17.67%) experienced 76 treatment emergent adverse events but no serious adverse events were observed.CONCLUSIONS: Based on the study results, BOTULAX® is considered to be an effective and safe treatment for essential blepharospasm.

Choroidal Thickness in Thyroid-associated Ophthalmopathy between Normal Tension Glaucoma Using Optical Coherence Tomography

PURPOSE: To compare the macular choroidal thickness in patients with thyroid-associated ophthalmopathy (TAO) with those with normal tension glaucoma (NTG). METHODS: A total of 70 normal eyes, 74 eyes with TAO and 60 eyes with NTG were enrolled in this study. All patients underwent spectral-domain optical coherence tomography (SD-OCT) (Cirrus HD-OCT, Carl Zeiss Meditec Inc., Dublin, CA, USA). Macular choroidal thickness was assessed using enhanced depth imaging. The average macular choroidal thickness was defined as the average value of three measurements: at the fovea and at the points located 1.5 mm in the nasal and temporal directions from the fovea. Generalized estimating equations were used to uncover factors affecting the average macular choroidal thickness. RESULTS: The average, superior and inferior quadrant retinal nerve fiber layer thicknesses were significantly thinner in the NTG group compared with the TAO and control groups (p < 0.001). The average macular choroidal thickness of the TAO group, NTG group and controls was 281.01 ± 60.06 µm, 241.66 ± 55.00 µm and 252.07 ± 55.05 µm, respectively, which were significantly different (p = 0.013). The subfoveal, nasal and temporal side choroidal thicknesses were significantly thinner in the NTG group compared with the TAO group (p = 0.014, 0.012 and 0.034, respectively). Subjects with TAO were associated with a thicker average macular choroidal thickness compared with the NTG group after adjusting for age, sex, spherical equivalent and intraocular pressure (β = 32.61, p = 0.017). CONCLUSIONS: Macular choroidal thickness was significantly thicker in patients with TAO compared with those with NTG. Further evaluation is required to determine if a thick choroid in subjects with TAO has any role in glaucomatous optic neuropathy.

Diseases treated in oculoplasty

Most people think that ophthalmology only treat diseases of the eyeball, but there are also many diseases of the accessory organs around the eyeball. Oculoplasty is a field of ophthalmology that deals with diseases of the eyelids, lacrimal system, and orbit. These accessory organs play important roles in protecting the eyes and supporting their function. Sometimes, diseases of these organs cause cosmetic problems, as well as functional problems. In the past, this field was considered rather indifferently and was not well recognized, so the treatment of these diseases was not specialized. However, concomitantly with recent improvements in quality of life and the increased desire of patients for these diseases to be treated, the importance of this field is increasing and many oculoplastic specialists are being trained. In the oculoplastic field, wide range of diseases are treated. In this report, the author provides a brief overview of the most important and common oculoplastic diseases.

Corneal Endothelial Cell Loss after Tube Shunt Surgery in Fuch's Heterochromic Iridocyclitis

PURPOSE: To report a case of corneal failure after implantation of the Ahmed glaucoma valve occurring in a patient diagnosed with Fuchs' heterochromic iridocyclitis. CASE SUMMARY: A 53-year-old male who complained of ocular pain and suddenly decreased visual acuity in his right eye visited our clinic. His visual acuity was 0.15 and intraocular pressure (IOP) was 55 mm Hg. The slit-lamp examination revealed edematous cornea, fine round or stellate keratic precipitates connected with fine filaments on the endothelium and depigmentation of the iris. The corneal endothelial cell density was 2,958 cells/mm2. There was no specific finding in his left eye. The IOP did not improve with medical treatment, therefore, an Ahmed glaucoma valve was implanted in his right eye. At every follow-up exam the tube was well positioned and the IOP was maintained between 8 and 13 mm Hg. Eight months postoperatively, the patient complained of decreased visual acuity and the cell density was decreased to 1,408 cells/mm2. Posterior subcapsular cataract opacity was observed as well as progression of depigmentation and distortion of the iris. Seventeen months after the surgery, the cell density was 700 cells/mm2. On follow-up examination, his visual acuity was decreased to FC10 cm with the cataract progressing, therefore cataract surgery was performed. One month postoperatively, his vision improved to 0.1. However, the visual acuity deteriorated due to progression of the corneal edema and penetrating keratoplasty was performed. CONCLUSIONS: Aggravation of the corneal complication after Ahmed glaucoma valve implantation should be considered in patients with Fuchs' heterochromic iridocyclitis-induced glaucoma.

Blepharoptosis Repair through the Small Orbital Septum Incision and Minimal Dissection Technique in Patients with Coexisting Dermatochalasis

PURPOSE: To describe a modified surgical technique for blepharoptosis repair through a small orbital septum incision and minimal dissection, along with the results obtained in patients with coexisting dermatochalasis. METHODS: A retrospective chart review included 33 patients (52 eyelids) with blepharoptosis coexisting with dermatochalasis, surgically corrected through a small orbital septum incision and minimal dissection after redundant upper lid skin excision, by placing a single fixation suture between the levator aponeurosis and the tarsal plate. Outcome measures included the pre- and postoperative marginal reflex distances (MRD1), eyelid contour, post-operative complications, and need for reoperation. RESULTS: The pre- and postoperative MRD1 averaged 1.1 +/- 0.8 mm and 2.8 +/- 1.1 mm, respectively. Of the 33 patients, 9 patients (9 eyelids) underwent surgery on one eyelid for unilateral blepharoptosis and dermatochalasis (Group I), 5 patients (5 eyelids) underwent a simple skin excision blepharoplasty of the contralateral eyelid (Group II), and 19 patients (38 eyelids) underwent bilateral blepharoptosis and dermatochalasis repair (Group III). Of the 14 eyelids that underwent unilateral ptosis repair (Groups I and II), 12 eyelids (85.7%) showed less than a 1-mm difference from the contralateral eyelid. Of the 38 eyelids that underwent bilateral ptosis repair (Group III), 27 eyelids (71.1%), 5 eyelids (13.1%), and 6 eyelids (15.8%) had excellent, good, and poor outcomes, respectively. Overall, 44 eyelids (84.6%) out of a total of 52 eyelids had successful outcomes; the remaining 8 eyelids demonstrated unsatisfactory eyelid contour was corrected by an additional surgery. CONCLUSIONS: Blepharoptosis repair through a small orbital septum incision and minimal dissection can be considered an efficient technique in patients with ptosis and dermatochalasis.

A Case of Odontogenic Orbital Cellulitis Causing Blindness by Severe Tension Orbit

We report a very rare case of odontogenic orbital cellulitis causing blindness by severe tension orbit. A 41-yr old male patient had visited the hospital due to severe periorbital swelling and nasal stuffiness while he was treated for a periodontal abscess. He was diagnosed with odontogenic sinusitis and orbital cellulitis, and treated with antibiotics. The symptoms were aggravated and emergency sinus drainage was performed. On the next day, a sudden decrease in vision occurred with findings of ischemic optic neuropathy and central retinal artery occlusion. Deformation of the eyeball posterior pole into a cone shape was found from the orbital CT. A high-dose steroid was administered immediately resulting in improvements of periorbital swelling, but the patient's vision had not recovered. Odontogenic orbital cellulitis is relatively rare, but can cause blindness via rapidly progressing tension orbit. Therefore even the simplest of dental problems requires careful attention.

A Giant Pleomorphic Adenoma of Lacrimal Gland Involving the Palpebral Lobe Causing Severe Mechanical Ptosis

PURPOSE: To report a rare case of giant pleomorphic adenoma of the lacrimal gland involving the palpebral lobe causing severe mechanical ptosis and visual field defect, which was removed successfully. CASE SUMMARY: An 82-year-old man visited our clinic with a large protruding mass on his left upper lid that had grown for approximately 10 years causing severe ptosis. Preoperative orbital CT showed a 2.3 x 2.0 cm sized large mass which was suspicious of hemangioma. The mass was completely excised through a lid crease incision. The histopathologic examination showed typical findings of pleomorphic adenoma. After the surgery, preoperative mechanical ptosis was completely resolved and during the 6 months of follow-up, there was no abnormality of tear secretion and evidence of tumor recurrence. CONCLUSIONS: The authors experienced a rare case of giant pleomorphic adenoma of the lacrimal gland involving the palpebral lobe and resolved mechanical ptosis by complete removal of the tumor through a lid crease incision.

Temporary Severe Neurogenic Blepharoptosis after Reconstruction of Orbital Medial Wall Fracture

PURPOSE: To report two cases of temporary severe neurogenic blepharoptosis after successful reconstruction of orbital medial wall fracture. CASE SUMMARY: A 36-year-old woman and a 52-year-old man received orbital medial wall reconstruction with Medpor(R) for large fractures. Before the operation, the patients had only moderate swelling of the lid and periorbital ecchymosis. There were no limitations of extraocular muscles or ptosis. The operations were successful, although the patients developed unilateral complete ptosis with totally impaired levetor muscle function immediately after recovering from anesthesia. There were no anisocoria or limitations of the extraocular muscles. After oral steroid therapy, the patients began to improve on postoperative day 4 and after one month, respectively, and recovered to normal lid height and levator function after two months. CONCLUSIONS: Blepharoptosis after orbital medial wall reconstruction may result from ischemic damage at the end of the superior branch of the oculomotor nerve in the orbit due to compressive and tractional manipulation. Although very rare and temporary, this complication should be considered important because the occurrence can be unpredictable and may cause dissatisfaction to the surgeon and the patient after a successful operation.

Recurrent Alveolar Soft-Part Sarcoma With Concurrent Involvement of the Orbit and Multiple Sites of the Body

PURPOSE: To report a rare case of recurrent alveolar soft-part sarcoma (ASPS) with concurrent involvement of the orbit and multiple sites of the body that was removed successfully by surgery. CASE SUMMARY: A 37-year-old woman presented with diplopia at the left lateral gaze and proptosis of the left eye. Two years earlier, the patient had a mass excision of the right gluteus maximus and the left orbit, and ASPS was histopathologically diagnosed at that time. In addition, the patient had been treated with chemotherapy and radiation therapy. On radiologic examination, recurrent tumor of the left orbit was found and surgically removed. The histopathologic examination showed that tumor cells were arranged in an alveolar pattern divided by fibrous septa and contained abundant granules in the cytoplasm, typically consistent with ASPS. Postoperatively, the symptoms of diplopia and proptosis improved. CONCLUSIONS: ASPS can occur and recur in the orbit as well as systemically. In addition, at the time of surgical removal of ASPS in the orbit, the surgeon should be particularly cautious of massive bleeding.

A Case of Alcaligenes xylosoxidans Keratitis in a Soft Contact Lens Wearer

PURPOSE: To report a case of corneal ulcer due to Alcaligenes xylosoxidans in a soft contact lens wearer. CASE SUMMARY: A 20-year-old female patient presented with a corneal ulcer. The patient had been wearing soft contact lenses over 6 months. The ulcer had a typical appearance, similar to that of immune infiltration due to contact lenses. However, the corneal scraping and culture yielded Alcaligenes xylosoxidans, which is susceptible to ceftazidime and levofloxacine in the antibiotic susceptibility test. After treatment with topical antibiotics, her eye improved, with only a mild corneal scar remaining. CONCLUSIONS: Alcaligenes xylosoxidans should be considered as a potential causal pathogen of keratitis upon wearing soft contact lenses. Additionally, any lesion should be suspected as a bacterial corneal ulcer, even if appearing as an immune infiltration due to contact lenses.

Anterior Segment Parameters Using Pentacam and Prediction of Corneal Endothelial Cell Loss after Cataract Surgery

PURPOSE: We evaluated various preoperative anterior segment parameters measured with a Pentacam rotating Scheimpflug camera and compared them with those of conventional methods. We also evaluated the effect of different parameters on corneal endothelial cells after cataract surgery. METHODS: Pentacam examination was performed in 88 eyes from 88 patients to evaluate central anterior chamber depth (ACD(pentacam)), nuclear density (Densitometry(pentacam)), anterior chamber volume (ACV), and lens thickness (LT(pentacam)). We compared values of ACD(pentacam) with those of ultrasound (ACD(sono)) and also compared Densitometry(pentacam) values with those of Lens Opacities Classification System (LOCS III) classification. We evaluated the effect of the following preoperative values measured with Pentacam on postoperative endothelial cell loss: pupil size measured both preoperatively and before capsulorrhexsis (Pupil(CCC)), amount of viscoelastics, and LT measured by ultrasound (LT(sono)). RESULTS: A significant concordance was found between the two grading methods of nuclear opacity: Densitometry(pentacam) and LOCS III classification (tau(b) = 0.414, p = 0.000). We also found a positive correlation between ACD(pentacam) and ACD(sono) (r = 0.823, p = 0.000) and between ACD(pentacam) and ACV (r = 0.650, p = 0.000). There were significant differences between the results of LT(pentacam) and LT(sono). The final regression model identified Densitometry(pentacam), viscoelastics and Pupil(CCC) as independent predictors of decreased postoperative corneal endothelial cell density (CD) at postoperative day 3, and Densitometry(pentacam), viscoelastics, and ACV as independent predictors of decreased CD two months postoperatively (p<0.05). CONCLUSIONS: Good agreement was found between all results obtained with the Pentacam and conventional methods except LT. Analyzing anterior chamber parameters preoperatively using Pentacam could be helpful to predict postoperative endothelial cell loss.

Blepharoptosis Repair by Small Cutaneous Incision and Minimal Dissection Technique

PURPOSE: To present a simple method of acquired ptosis correction by small-incision minimal dissection technique and assess the results of the operation. METHODS: The charts of 23 patients (29 eyes) with acquired ptosis who underwent ptosis correction by small-incision minimal dissection technique were reviewed. Pre and postoperative MRD1, success rate, complications and reoperation rates were investigated. RESULTS: The average of pre- and postoperative MRD1 were 0.9+/-0.9 mm and 2.7+/-0.8 mm respectively. Of the 17 patients who underwent unilateral surgery, 15 eyes (88.2%) showed successful outcomes, and of the 12 eyes who underwent bilateral surgery, 8 eyes (66.6%), 2 eyes (16.7%), and 2 eyes (16.7%) showed excellent, good, and poor outcomes, respectively. Out of 29 eyes, 25 eyes (86.2%) showed satisfactory results. Two eyelids of unsatisfactory contour were corrected by reoperation. CONCLUSIONS: Although the small-incision minimal dissection technique for ptosis correction is applicable to a restricted group of patients compared to the conventional method, this technique is very useful and efficient, and has many advantages including less tissue damage, bleeding, edema, a short operation time and rapid recovery.

Blepharoptosis Repair by Small Cutaneous Incision and Minimal Dissection Technique

PURPOSE: To present a simple method of acquired ptosis correction by small-incision minimal dissection technique and assess the results of the operation. METHODS: The charts of 23 patients (29 eyes) with acquired ptosis who underwent ptosis correction by small-incision minimal dissection technique were reviewed. Pre and postoperative MRD1, success rate, complications and reoperation rates were investigated. RESULTS: The average of pre- and postoperative MRD1 were 0.9+/-0.9 mm and 2.7+/-0.8 mm respectively. Of the 17 patients who underwent unilateral surgery, 15 eyes (88.2%) showed successful outcomes, and of the 12 eyes who underwent bilateral surgery, 8 eyes (66.6%), 2 eyes (16.7%), and 2 eyes (16.7%) showed excellent, good, and poor outcomes, respectively. Out of 29 eyes, 25 eyes (86.2%) showed satisfactory results. Two eyelids of unsatisfactory contour were corrected by reoperation. CONCLUSIONS: Although the small-incision minimal dissection technique for ptosis correction is applicable to a restricted group of patients compared to the conventional method, this technique is very useful and efficient, and has many advantages including less tissue damage, bleeding, edema, a short operation time and rapid recovery.

Solitary Kaposi's Sarcoma of the Lower Lid in an HIV-Negative Patient

PURPOSE: To report a case of solitary Kaposi's sarcoma (KS) of eyelid in an HIV-negative patient, which has not yet been reported in domestics. CASE SUMMARY: A 76-year-old woman was seen at our clinic with a purplish nodular mass on her left lower lid that had grown up for 4 months prior. There were no abnormal findings in the body except eyelid. In the routine laboratory examinations, the result of HIV test was negative. The lesion was completely excised and the eyelid was reconstructed by semicircular rotational flap procedure. The histopathologic examination showed spindle cells of mild atypism, intermixed with slit-like vascular spaces and red blood cell extravastaion. These findings coincided with KS and polymerase chain reaction was positive for human herpes virus-8. During 10 months follow up, there was no evidence of tumor recurrence and systemic abnormalities. CONCLUSIONS: We experienced that Kaposi's sarcoma can occur solitarily in the eyelid of HIV-negative patient and favorable prognosis can be obtained by only surgical resection.

Wrapping of Porous Orbital Implant Using Acellular Dermal Allograft

PURPOSE: To investigate the results when using the acellular dermal allograft (SureDerm(R), Hans Biomed Co., Korea) as a new wrapping material for porous orbital implants. METHODS: The charts of 11 patients who underwent either primary or secondary insertion of Medpor(R) orbital implants after enucleation or a new insertion after removal of previous orbital implants were reviewed. Medpor(R) orbital implants either 18 or 20 mm were wrapped with SureDerm(R) in 4x4 cm sections that were 1-mm-thick. Four rectus muscles were fixed to the SureDerm(R) wrapped implant, and a conjunctival suture was made with 6-0 Vicryl. All patients had follow-up periods longer than 10 months and were evaluated to determine the success of wrapping and to identify any complications. RESULTS: The average age of the patients was 48.3 years. The patients wore artificial eyes for 9 weeks after the operation, and the follow-up periods were 22.4 months on average. There was no case of implant or SureDerm(R) exposure, inflammation, and other significant complications except in one case that required fornix reconstruction to allow the subject to wear an artificial eye. CONCLUSIONS: Acellular dermal allograft appears to be a good substitute material if preserved sclera is not available when inserting orbital implants with wrapping.

Orbital Implant Infection after Drilling Procedure

PURPOSE: To report the severity of orbital implant infection related to a drilling procedure and to provide a foundation for reevaluating this procedure. METHODS: We investigated retrospectively 17 patients who were suspected of orbital implant infection and whose infected implants were ultimately removed. In these patients, increased mucopurulent eye discharge and implant exposure after the drilling procedure were observed. We attempted to treat them with topical and systemic antibiotics, but the discharge and implant exposure did not improve. RESULTS: Of the 17 removed implants, 13 were hydroxyapatite and 4 were Medpor(R). The pegs used were plastic pegs in 12 cases and titanium pegs in 5 cases. The average duration from the first orbital implant insertion to drilling was 10.2+/-5.3 months. The average duration from drilling to severe infection symptoms was 37.0+/-30.0 months. The average duration from the onset of symptoms to implant removal was 12.9+/-12.6 months. The mean follow-up period after final surgery was 15.4 months. In most cases, the deep portions of the removed implants were fragile, malodorous, and filled with pus. Acute and chronic inflammatory cell infiltrations were observed in the pathological examinations, and H. influenzae, S. aureus, S. viridans were identified. They did not receive any drilling procedure thereafter and no infection or inflammatory sign was subsequently observed. CONCLUSIONS: Drilling and pegging can cause unexpected, severe complications such as orbital implant infection, in which the infected implant has to be removed to be cured. Therefore, before performing a drilling procedure doctors should carefully consider the patient's preferences and urgent needs.

Treatment of Exposed Hydroxyapatite Orbital Implant Using Acellular Dermal Allograft

PURPOSE: To investigate the results of acellular dermal allograft (SureDerm(R), Hans Biomed Co., Korea) as a new covering material in the exposure of hydroxyapatite orbital implant. METHODS: SureDerm graft was performed in 5 patients with exposed hydroxyapatite orbital implant. Under local anesthesia, the anterior surface of the exposed implant was trimmed and the designed SureDerm was sutured at the margin of the sclera with 6-0 Vicryl. Finally, conjunctival suture was done. The patients were followed up regularly until postoperative 10 months. RESULTS: The average diameter of exposed implant was 9.6 X 9.0 mm. The grafted SureDerm had survived in all patients at postoperative 10 months and exposure of implant was treated successfully in all cases. CONCLUSIONS: We consider that acellular dermal allograft will be a good replacing material when preserved sclera is not available. It also features the advantage of avoiding the intricate harvesting procedure and the scarring of the donor site in dermo-fat graft.

Bicanalicular Silicone Tube Intubation after Simple Probing in Common Canaliculus Obstruction

PURPOSE: To investigate the surgical outcome of silicone tube intubation after simple probing performed in obstruction of distal part of canaliculus or common canaliculus. METHODS: Silicone tube intubation was done in 24 patients with obstruction of distal part of canaliculus or common canaliculus, whose obstruction was readily opened by simple probing under mild pushing pressure and who had successful lacrimal irrigation after probing. Silicone tube was removed at about 6 months after operation and the epiphora improvement, dye disappearance test, and lacrimal irrigation test were evaluated at 2 month after the intubation and 2 months after the tube removal. RESULTS: The average of probing to perforate the obstructed canaliculus were 2.1. At 1 month after the intubation, epiphora was improved in 19 patients (79.2%), and 18 patients (75.0%) showed a grade 2+ or lower in dye disappearance test, and lacrimal irrigation was successful in 21 patients (87.5%). 2 months after the tube removal, epiphora was improved in 18 patients (75.0%), and 18 patients (75.0%) showed a grade 2+ or lower in dye disappearance test, and lacrimal irrigation was successful in 20 patients (83.3%). CONCLUSIONS: When the obstruction of distal part of canaliculus or common canaliculus is thin membranous nature, good surgical outcome can be expected by silicone tube intubation after simple probing using mild pushing pressure without other special procedure.

Punctoplasty using Cut Down Tube

PURPOSE: We introduce a new surgical procedure for punctal stenosis, which is to insert a soft and thin cut-down tube, commonly used in general surgery. METHODS: After two snip operation, we inserted cut-down tube into canaliculus through incised punctum. We cut the tube for not touching to the cornea and buried in incision site. At postoperative 1 day, we asked patients their uncomfortness and examined ocular state with slit lamp. And then we removed the tube 4 days later. At postoperative 2 month, we evaluated whether epiphora improved or not and estimated the size of dialted punctum with caliper. Dye disappearance test and lacrimal irrigation test were also performed. RESULTS: Of 11 patients, 8 patients had no epiphora. Average diameter of dilated punctum was 1.77 +/- 0.20mm. In all patients, we found dilated punctum more than 1mm and confirmed patency by lacrimal irrigation test. 8 patients did not feel uncomfortness, and 3 patients felt a little uncomfortness. But no one felt severe discomfort. Although we found corneal erosion and conjunctival injection in 2 patients, they recovered in a few days. CONCLUSIONS: By this procedure, we reduced patient's hospital visit and pain resulting from postoperative care. And we observed well dilated punctum after the procedure. Therefore, punctoplasty using cut down tube is useful procedure for punctal stenosis, especially for recurrent stenosis after snip operation.