46例穿透性角膜移植术的改进     

严灿荣  阎亦农 《湛江医学院学报》2000,18(2):146-147

探讨穿透性角膜移植术全过程中改善移植预后的方法。方法：在４６例穿透性角膜移植过程中,注意手术过程中的各个环节,包括：新鲜或保存良好的供体角膜;手术过程中采用多种方法保护角膜内皮细胞;前取供体植片时前房注入１０ｇ／Ｌ玻璃酸钠,内皮侧冲切制作值入,将植入预预置缝合６针固定于植床再用１０ｇ／Ｌ玻璃酰内及眼用平衡盐溶液形成前房;适时拆线防止排斥反应的发生;及早治疗移植排斥反应。结果：术后随访３－３６个月  相似文献   

A cross‐linked hyaluronan gel accelerates healing of corneal epithelial abrasion and alkali burn injuries in rabbits     

Guanghui Yang  Ladan Espandar  Nick Mamalis  Glenn D. Prestwich 《Veterinary ophthalmology》2010,13(3):144-150

Objective To evaluate the efficacy of a chemically modified and cross‐linked derivative of hyaluronan (CMHA‐SX) for treatment of corneal epithelial abrasion and standardized alkali burn injuries. Animals Twelve female New Zealand white rabbits in two groups were used. Procedures Bilateral 6‐mm diameter corneal epithelial abrasions were made in each of six rabbits in one group and 6‐mm standardized alkali burn injuries were made in the second group. A 1% CMHA‐SX formulation was applied topically four times per day in right eye of each rabbit for 1 week, and phosphate buffered saline (PBS) was placed in left (control) eye of each rabbit. The wound size was determined by staining with 1% fluorescein and photographed at the slit lamp with a digital camera at 0, 1, 2, 3 days postoperatively in the first group and 0, 1, 2, 3, 7, 12 days in the second group. Rabbit corneas were collected for histological examination on day 7 in the first group and day 12 in the second group. Results Closure of corneal wound in the abrasion model was complete in the CMHA‐SX treated eye by 48 h. The wound closure rate and thickness of the central corneal epithelium in the CMHA‐SX treated group was greater than in control eyes for both the abrasion and alkali burn injuries. Moreover, the CMHA‐SX treated cornea exhibited better epithelial and stromal organization than the untreated control cornea. Conclusions Chemically modified and cross‐linked derivative of hyaluronan improved corneal wound healing and could be useful for treating noninfectious corneal injuries.  相似文献   

老年性白内障术后角膜厚度的变化     

冯晓津  廖天江 《湛江医学院学报》2001,19(3):173-174

目的 :观察老年性白内障术后角膜厚度的变化。方法 :老年性白内障患者 18例 ,(2 2眼 )在术前及术后第 1、2、3天 ,采用 DGH- 2 0 0 0 - AP超声角膜测厚仪测量中央及周边角膜厚度 ,并进行统计学分析。结果 :术后第 1天角膜增厚最明显 ,第 2、3天逐渐减轻 ,3d间角膜厚度的差异有显著性 (P<0 .0 1) ;术后角膜增厚以上方周边角膜为重 ,中央部次之 ,下方周边角膜最轻 ,三个部位之间的差异有显著性 (P<0 .0 1)。结论 :白内障术后角膜厚度的变化与手术切口、手术操作有关。  相似文献   

Tear production,intraocular pressure,and central corneal thickness in white‐tailed deer (Odocoileus virginianus)     

Tatiane Villar  Ana L. Pascoli  Aislinn Klein  Flor C. Chacaltana  Erotides Capistrano  Cliff F. Shipley  Bianca C. Martins 《Veterinary ophthalmology》2020,23(1):123-128

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Management of corneal epithelial defects in a population of mature chuck‐will’s‐widows (Antrostomus carolinensis) in South Florida     

Taryn L. Overton  Robert L. Swinger  Megan E. Climans  Antonia L. Gardner  Amanda L. Grant  Renata M. Schneider  Richard R. Dubielzig  Leandro B. C. Teixeira 《Veterinary ophthalmology》2020,23(3):567-574

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Ocular findings in healthy newborn foals according to age     

M. Leiva  T. Peña  L. Monreal 《Equine Veterinary Education》2011,23(1):40-45

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Effect of central corneal thickness on intraocular pressure with the rebound tonometer and the applanation tonometer in normal dogs     

Park YW  Jeong MB  Kim TH  Ahn JS  Ahn JT  Park SA  Kim SE  Seo K 《Veterinary ophthalmology》2011,14(3):169-173

Objective To evaluate the effect of central corneal thickness (CCT) on the measurement of intraocular pressure (IOP) with the rebound (TonoVet^®) and applanation (TonoPen XL^®) tonometers in beagle dogs. Animal studied Both eyes of 60 clinically normal dogs were used. Procedures The IOP was measured by the TonoVet^®, followed by the TonoPen XL^® in half of the dogs, while the other half was measured in the reverse order. All CCT measurements were performed 10 min after the use of the second tonometer. Results The mean IOP value measured by the TonoVet^® (16.9 ± 3.7 mmHg) was significantly higher than the TonoPen XL^® (11.6 ± 2.7 mmHg; P < 0.001). The IOP values obtained by both tonometers were correlated in the regression analysis (γ² = 0.4393, P < 0.001). Bland–Altman analysis showed that the lower and upper limits of agreement between the two devices were ?0.1 and +10.8 mmHg, respectively. The mean CCT was 549.7 ± 51.0 μm. There was a correlation between the IOP values obtained by the two tonometers and CCT readings in the regression analysis (TonoVet^® : P = 0.002, TonoPen XL^® : P = 0.035). The regression equation demonstrated that for every 100 μm increase in CCT, there was an elevation of 1 and 2 mmHg in IOP measured by the TonoPen XL^® and TonoVet^®, respectively. Conclusions The IOP obtained by the TonoVet^® and TonoPen XL^® would be affected by variations in the CCT. Therefore, the CCT should be considered when interpreting IOP values measured by tonometers in dogs.  相似文献   

Schirmer tear test, phenol red thread tear test, eye blink frequency and corneal sensitivity in the guinea pig     

Trost K  Skalicky M  Nell B 《Veterinary ophthalmology》2007,10(3):143-146

OBJECTIVE: To establish reference values for Schirmer tear tests (STT) I and II, phenol red thread (PRT) tear test and eye blink frequency, and to determine corneal sensitivity for normal guinea pigs. ANIMALS STUDIED: One hundred and eight eyes of 54 adult Duncan-Hartley guinea pigs. PROCEDURE: Schirmer tear test (STT) I and then STT II were performed in 36 guinea pigs. PRT and STT I were compared in 18 adult Duncan-Hartley guinea pigs. Corneal sensitivity was determined in 23 guinea pigs by evaluating the corneal touch threshold (CTT) of five different regions using a Cochet-Bonnet esthesiometer. Eye blink frequency was measured in 10 guinea pigs over a period of 20 min and in 17 guinea pigs over a period of 10 min. RESULTS: Mean STT I was 0.36 mm +/- 1.09 mm (wetting/min) and mean STT II was 0.43 mm +/- 1.29 mm (wetting/min). There was no significant difference between mean STT I and mean STT II (P = 0.79). The mean PRT-value was 16 +/- 4.7 mm (wetting/15 s), and the mean STT I-value in the same guinea pigs was 0.6 +/- 1.83 mm (wetting/min). Corneal sensitivity was significantly higher in the center than in the four limbal regions. The mean CTT for central, ventral, nasal, temporal and dorsal regions was 2, 1.7, 1.7, 1.7 and 1.6 cm or 3.7, 5.2, 5.6, 5.7 and 6.4 g/mm(2), respectively. Eye blink frequency was between two to five (mean 3.4 +/- 1.04) blinks per eye over 20 min in guinea pigs in their home environment, while in handheld and restrained guinea pigs eye blink frequency showed a variation between 0 and 17 blinks per eye (mean 3.24 +/- 3.64 blinks per eye) over 10 min. CONCLUSIONS: As there were no significant differences between STT I and STT II results, reflex tear secretion in the guinea pig may not exist. The most likely explanation is a lower corneal sensitivity in the guinea pig than in other species, such as cats, dogs and horses. Because of the small amount of tears, PRT is the preferred test for tear measurement in the guinea pig.  相似文献   

Lidocaine effects on corneal endothelial cell ultrastructure     

Schellini SA  Creppe MC  Gregório EA  Padovani CR 《Veterinary ophthalmology》2007,10(4):239-244

The purpose of this study was to determine whether intracameral commercial lidocaine 2% induces alterations on the rabbit corneal endothelium. Forty white rabbits received different substances inside the anterior chamber: group (G)1, no substance; G2 and G3 received lidocaine 2% with preservative in aqueous solution; G4 and G5, lidocaine 2% with preservative in gel solution; G6 and G7, the anesthetic preservative (metilparahydroxybenzoate 0.1%); and G8 and G9, lidocaine 2% without preservative in aqueous solution. The animals from G2, 4, 6 and 8 were sacrificed after 1 h, and from G3, 5, 7 and 9 after 24 h after injection of the substance inside the anterior chamber. The corneas were clinically evaluated and assessed by transmission and scanning electron microscopy. G1, 2, 6, 7, 8 and 9 animals had very similar characteristics in clinical, ultrastructural and morphometric evaluations; the G3 and G4 animals showed discrete edema and one animal in G5 had intense corneal edema. We conclude that lidocaine 2% with preservative induces few ultrastructural alterations in the corneal endothelial cells.  相似文献   

Histopathological evaluation of the ocular-irritation potential of shampoos,make-up removers and cleansing foams in the bovine corneal opacity and permeability assay     

Masatoshi Furukawa  Takashi Sakakibara  Kouta Itoh  Kohtaro Kawamura  Satoshi Sasaki  Masao Matsuura 《Journal of toxicologic pathology》2015,28(4):243-248

The bovine corneal opacity and permeability (BCOP) assay is an alternative method to the in vivo Draize eye test in rabbits for evaluating eye irritation in vitro. Here, we compared the numerical results of the BCOP assay with the corresponding histopathology for three different corneas for each test substance, including commercially available shampoos, make-up removers and cleansing foams that contained surfactants and other ingredients. The histopathological score was defined based on the severity of lesions in the corneal epithelium. The histopathological findings and scores of the three sections for each test substance were comparable. The in vitro irritancy score (IVIS) generally corresponds to the corneal irritant potential of the test substances assigned on the basis of the histopathological findings in this study. In the present study, we characterized the histopathology of the corneal epithelium and stroma and especially showed that the corneal epithelial injury caused by test substances might be important in assessment of test substances that are mild eye irritants (category 2B) as classified by the United Nations (UN) Globally Harmonized System of Classification and Labelling of Chemicals (GHS), as corneal lesions suggestive of classification into category 2B were localized on the border between the corneal epithelium and stroma, which contained cell elements related to assessment of prognosis of an in vivo eye injury. Histopathological assessment might be useful in predicting in vivo ocular irritation, particularly for test substances with an IVIS >3.1 but ≤25 that are classified as mild irritants (category 2B) according to the UN GHS.  相似文献