• 한국어병학회지
• /
• 제16권2호
• /
• pp.75-80
• /
• 2003

Red scabream, Pagrus major , is a valuable aquaculture species in Korea , but spontaneous eye abnormality occurred in cultured individuals . The incidence of eye abnormality was 4% in the group of cultured red scebream. The abnormality was characterized by unilateral and bilateral exophthalmos, opacity and lens pathology. Lense prolapse was found in two cases. Lenses in diseased fishes was considerably small in diameter and eyes were deformed as a whole. In the group of induced hybrid red scabream Pagrus major (♀) x black seabrearn Acanthopagrus schlegeli (♂), the incidence of eye abnormality wa~ the same 4%, but only opacity was registered. Opacity was also found in two of sixteen examined Wild-caught red seabrcam. Histopathological changes of lenses in cultured red seabreem included vecuolated cytoplasm of lens fibers, necrosis of fibers in central part of lens, folding and increase in thickness of lens capsule, and epithelial proliferation beneath the anterior lens capsule. In affected eyes no parasites or gas bubbles were found.

• 한국임상수의학회지
• /
• 제14권1호
• /
• pp.56-64
• /
• 1997

These studies were performed to investigate the complications affecting the vision after extracapsular lens extraction(ECE), the effects of an I/A (irrigation & aspiration)device and a viscoelastic material used on the vision, the occurrence of complications and the effective corneal incision method to reduce the corneal opacity in dogs. ECE was performed bilaterally with 3 different methods using clinically normal twele mixed dogs; the method in which I/A device and viscoelastic material were not used, the method in which I/A device was used but viscoelastic material not, and the method in which I/A device and viscoelastic material were used. Postoperative complications were observed as followed; conjunctival injection, uveitis, corneal opacity due to endothelial cell loss, hyphemia, remnants of lens cortex, vitreous loss, synechia and capsular opacity. Preservation rate of vision was lower significantly in the cases showing signs of synechia, capsular opacity, or remnants of lens cortex than the cases not showing the above signs(p<0.01). There were significant reduction of the complications such as corneal opacity, clot in anterior chamber in the group using I/A device compared to the group in which I/A device was not used(p<0.01). Groups using I/A device showed slightly higher vision than the group not using I/A device (75%; 42%). There were no significant differences in the occurrence rate of complications and the preservative rate of vision between the groups with and without viscoelastic material. The present study indicated that the postoperative complications of posterior synechia, capsular opacity, uveitis and vistreous loss were important factors affecting the vision and that I/A device was applicable to extract the lens cortex and effective to elevate the success rate after ECE in dogs.

• 생약학회지
• /
• 제40권4호
• /
• pp.339-344
• /
• 2009

Diabetic cataract is a major complication of diabetes mellitus. Excess accumulation of sorbitol plays an important role in the pathogenesis of diabetic complications such as cataract formation. In this study, we investigated the inhibitory effect of the extract of the aerial parts of Aster koraiensis (AK) on diabetic cataractogenesis. To examine this further, we evaluated sorbitol accumulation during cataract development using streptozotocin-induced diabetic rat, an animal model of type 1 diabetes. Diabetic rats were treated orally with AK (100 mg/kg and 200 mg/kg body weight) once a day orally for 9 weeks. In vehicle-treated diabetic rats, lens opacity was increased, and lens fiber swelling and membrane rupture were observed. In addition, sorbitol accumulation in diabetic lens was markedly enhanced. However, AK treatment delayed the progression of diabetic cataract through the inhibition of sorbitol accumulation, and prevented lens fiber degeneration in a dose-dependent manner. These observations suggest that AK treatment can delay the progression of lens opacification in the diabetic rats during the early diabetic cataractogenesis.

• 한국안광학회지
• /
• 제18권1호
• /
• pp.53-59
• /
• 2013

목적: 40세 이상 한국 성인남녀에서 수정체의 혼탁 종류에 따른 백내장의 유형별 유병률을 산출하고 교정시력을 알아보았다. 방법: 제4기 국민건강영양조사(NHANES) 중 2009년 자료를 이용하여 인구 기반 단면 연구로 디자인하였다. 40세-95세까지 총 4,977명에 대해 연령과 성별에 따라 층화하여 백내장의 유병률과 수정체 혼탁의 종류에 따른 유병률을 조사하였다. 전체 대상자의 평균 연령은 $58.28{\pm}12.07$세 였고, 남자가 2,142명(43.0%), 여자가 2,835명(57.0%)이었다. 교정시력은 0.63 미만인 경우를 산출하였다. 결과: 전체대상자 4,977명 중에서 현재 백내장이 있는 경우는 40.6%(남자 17.5%, 여자 23.1%)로 나타났다. 백내장의 유형별 유병률은 핵형(56.3%), 피질형(23.4%), 혼합형(16.2%), 전낭하(3.0%), 후낭하(1.1%) 순으로 나타났다. 유형별 남녀의 차이는 없었고, 모든 연령대에서 핵형이 가장 많았다. 전낭하 백내장은 대부분의 경우에서 교정시력이 0.63 미만으로 낮았다. 결론: 핵형 백내장의 유병률이 가장 높았고, 수정체의 혼탁을 고려한 역학 연구와 예방 정책의 수립이 필요할 것으로 사료된다.

• Biomolecules & Therapeutics
• /
• 제24권2호
• /
• pp.178-183
• /
• 2016

Naturally occurring coumarin compounds have received substantial attention due to their pharmaceutical effects. Esculetin is a coumarin derivative and a polyphenol compound that is used in a variety of therapeutic and pharmacological strategies. However, its effect on aldose reductase activity remains poorly understood. In this study, the potential beneficial effects of esculetin on lenticular aldose reductase were investigated in galactose-fed (GAL) rats, an animal model of sugar cataracts. Cataracts were induced in Sprague-Dawley (SD) rats via a 50% galactose diet for 2 weeks, and groups of GAL rats were orally treated with esculetin (10 or 50 mg/kg body weight). In vehicle-treated GAL rats, lens opacification was observed, and swelling and membrane rupture of the lens fiber cells were increased. Additionally, aldose reductase was highly expressed in the lens epithelium and superficial cortical fibers during cataract development in the GAL rats. Esculetin reduced rat lens aldose reductase (RLAR) activity in vitro, and esculetin treatment significantly inhibited lens opacity, as well as morphological alterations, such as swelling, vacuolation and liquefaction of lens fibers, via the inhibition of aldose reductase in the GAL rats. These results indicate that esculetin is a useful treatment for galactose-induced cataracts.

• Journal of Nutrition and Health
• /
• 제35권2호
• /
• pp.229-236
• /
• 2002

Cataracts are the leading cause of blindness worldwide and are characterized by increased opacity of the lens that significantly diminishes visual acuity. It has been suggested that increased risk of lens opacities are associated with age, exposure to sunlight, diabetes, smoking, and poor nutrition. Antioxidant nutrients have born demonstrated to protect the lens membrane and protein against damage due to oxidative stress. The purpose of this study was to investigate the antioxidant system in the blood of cataract patients. The status of the blood antioxidant system was evaluated based on the levels of antioxidant vitamins and minerals as well as glutathione peroxidase (GSH-Px) and malondialdehyde (M7A) activity in 34 patients with cataracts (17 male and 17 female) and 45 control subjects (20 male and 25 female). After adjusting for age, the results showed significantly lower levels of antioxidant vitamins such as lycopene (M : p < 0.05, F: p < 0.01), zeaxanthin (F: p < 0.01), ${\gamma}$-tocopherol (F: p < 0.01) and ascorbic arid (M: p < 0.05) in the cataract patients than in the control subjects. In contrast, the concentration of cryptoxanthin (F : p < 0.07) showed a significantly higher value in the cataract patients. The serum level of the antioxidant mineral Zn (M : p < 0.01) was found to be significantly lower in the cataract patients while the ratio of cu/zn appeared significantly higher (M : p < 0.05). Significantly higher (M : p < 0.01, F: p < 0.05) concentrations of MDA in serum was found in the cataract patients as compared to the control subjects. GSH-Px activity was significantly lower (F: p < 0.05) in 71e cataract patients. In conclusion, the antioxidant system may play an important roll in cataract creation. Further studies are needed to clarify the mechanisms underlying these findings and to establish preventive measures with an emphasis on antioxidant nutrition for cataract patients.

• 대한유전성대사질환학회지
• /
• 제22권2호
• /
• pp.37-45
• /
• 2022

Inherited metabolic disorders (IMD) are a large group of rare disorders affecting normal biochemical pathways. The ophthalmic involvement can be very varied affecting any part of the eye, including abnormalities of cornea, lens dislocation and cataracts, retina and the optic nerve, and extraocular muscles. Eye disorders can be initial symptoms of some IMD and can be clue for diagnosis of IMD. However, eye disorders can evolve later in the natural history of an already diagnosed metabolic disorder. Awareness of IMDs is important to facilitate early diagnosis and in some cases instigate early treatment if a patient presents with eye involvement suggestive of a metabolic disorder. Ophthalmological interventions are also an important component of the multisystem holistic approach to treating patients with metabolic disorders.

• 생약학회지
• /
• 제39권3호
• /
• pp.165-173
• /
• 2008

Aldose reductase (AR), the principal enzyme of the polyol pathway, has been shown to play an important role in the diabetic complications, including diabetic cataract. The inhibitors of AR, therefore, would be potential agents for prevention of diabetic complications. As part of our ongoing project directed toward the discovery of preventive and/or treatment for diabetic complications, 48 Korean herbal medicines have been investigated with an in vitro evaluation system using aldose reductase inhibitory activities. Of these, 12 herbal medicines exhibited a significant inhibitory activity against aldose reductase. Particularly, seven herbal medicines, i.e., Eurya japonica, Chrysanthemum indicum, Akebia quinata, Saururus chinensis, Catalpa bignonioides, Lonicera japonica, Vitex rotundifolia showed two times more potent inhibitory activity than the positive control 3.3-tetramethyleneglutaric acid (TMG). In addition, Catalpa bignonioides showed the retardation of cataract-opacification of the lens of the eye under diabetic condition by xylose. Therefore, this result may provide a potential therapeutic approach for preventing and treating diabetic cataracts.

• 대한안과학회지
• /
• 제60권5호
• /
• pp.480-485
• /
• 2019

목적: 20년 동안 수정체 내에 잔존했던 안내 이물에 의해 발생한 백내장수술 후 안내염을 경험하였기에 보고하고자 한다. 증례요약: 45세 남자 환자가 3개월 전부터 시작된 우안의 점진적인 시력저하를 주소로 내원하였다. 세극등현미경검사상 우안 수정체전낭의 혼탁, 수정체핵경화, 후낭밑백내장 소견을 보였다. 과거력상 20년 전 못이 우안에 튀어 수상한 기왕력이 있었으며 수상 당시 시행한 세극등현미경검사에서는 안내 이물을 확인하지 못하였다. 환자는 계획에 따라 백내장수술을 시행하기로 하였다. 수정체유화술 중 수정체 내에 금속이물이 발견되어 금속이물을 안전하게 제거하고, 인공수정체를 삽입하였다. 술 후 3일째에 전방축농 소견이 관찰되어 항생제 유리체내주사를 시행하고 강화-항생제 안약을 점안하였다. 이후 전방내 염증 소견은 호전되었으며, 교정시력은 1.0으로 회복되었다. 결론: 외상 시 간과되어 안구 내에 잔존한 이물이 염증과 증상을 일으키지 않아 장기간 수정체 내에 잔존하였다가 이후 백내장을 진행시킨 경우에도 백내장수술 및 안내 이물제거 후 안내염이 발생할 수 있음을 주의해야 한다.

• Journal of the Optical Society of Korea
• /
• 제18권5호
• /
• pp.546-550
• /
• 2014

To investigate the minimum near-infrared ray intensity required (quantifiable threshold value) for consistent measurements of axial length (AL) using partial coherence interferometry (PCI), we attached two polarizing lenses (PL) to two types of PCI (IOLmaster, ALscan). The near-infrared ray intensity of PCI was modified by rotating the axis of one PL at intervals of 5 degrees. The right eye of each volunteer was measured three times and the AL and signal-to-noise ratio (SNR) was recorded five times for each measurement. Reduction of light intensity was theoretically estimated using Malus' Law. AL was measured consistently with both IOLmaster and ALscan until they reached 55 degrees (1.33 % of intensity) and 60 degrees (0.77%), respectively (P = 0.343, Log-rank test). In contrast, SNR decreased as light intensity decreased. In addition, to analyze media opacities that precluded measurement of AL, we retrospectively reviewed the medical records of patients unmeasurable by PCI (ALscan) from May to November 2013. Thirty-eight of 473 eyes (8.0%) could not be measured using ALscan due to media opacities, such as severe posterior subcapsular cataract (PSC, 11 eyes), hypermature cataract (9 eyes), and vitreous hemorrhage (18 eyes). The mean grades of vitreous haze and PSC were $7.72{\pm}0.96$ and $4.45{\pm}1.04$, respectively. In conclusion, up to 0.77-1.33% of near-infrared rays decreased, and AL could be measured consistently.