The ability of recovery in common carp after nitrite poisoning

The aim of the study was to assess the ability of recovery in common carp after nitrite poisoning and to distinguish the difference in nitrite poisoning of carp at two different chloride concentrations in water. Two groups of carp (group 1 and 2) were exposed to environmental nitrite concentration of 1.45 mmol/l NO2– at different chloride concentrations (group 1: 0.31 mmol/l Cl– and group 2: 3.73 mmol/l Cl–) for 48 hours. After that, they were transferred into nitrite-free water. In the group 1 mortality of 51% occurred during nitrite exposure and further 11% mortality was observed after 24 h in nitrite free water. No mortality occurred in group 2 and control. Nitrite and methaemoglobin concentrations (MetHb) markedly increased in group 1 (plasma: 10.5 ± 1.90 mmol/l NO2–, liver: 3.5 ± 1.15 mmol/kg NO2–, muscle: 1.5 ± 0.37 mmol/kg NO2–, and MetHb: 93 ± 6.1%) compared with control (plasma: 0.05 ± 0.04 mmol/l NO2–, liver: 0.02 ± 0.01 mmol/kg NO2–, muscle: 0.04 ± 0.01 mmol/kg NO2–, and MetHb: 3 ± 2.9%). After 24 h in nitrite-free water, the values mildly decreased but not significantly (plasma: 5.1 ± 1.49 mmol/l NO2–, liver: 1.8 ± 0.65 mmol/kg NO2–, muscle: 0.8 ± 0.23 mmol/kg NO2–, and MetHb: 84 ± 11.2%). After next 120 h the values decreased significantly and were compared with those found in the control group (traces of nitrite, MetHb: 3 ± 2.1%). Nitrite exposure caused also increase in plasma K+ (3.8 ± 0.29 mmol/l), ammonia (230 ± 92 µmol/l), urea (1.7 ± 0.28 mmol/l) and uric acid concentration (66 ± 54 µmol/l) in group 1. On the other hand, values of haematocrit, erythrocyte count and haemoglobin concentration were markedly lower than control values. Most changes were corrected by the end of the recovery period, only plasma potassium concentration dropped bellow the control values. Nearly no changes were found in the group 2 compared with the control during the whole experiment duration. This shows the positive effect of chlorides on the fish resistance against nitrites.

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Hematological values and total protein of Brasileiro de Hipismo and Breton mares during pregnancy

Ciência Rural ◽

10.1590/s0103-84782007000600029 ◽

2007 ◽

Vol 37 (6) ◽

pp. 1695-1700 ◽

Cited By ~ 10

Author(s):

César Andrey Galindo Orozco ◽

Carla Braga Martins ◽

Flora Helena de Freitas D' Angelis ◽

José Victor de Oliveira ◽

José Corrêa de Lacerda-Neto

Keyword(s):

Total Protein ◽

Packed Cell Volume ◽

Blood Cells ◽

Haemoglobin Concentration ◽

Control Group ◽

Group 3 ◽

Group 2 ◽

Second Period ◽

Hematological Values ◽

Group 1

Erythrocyte and leukocyte parameters and total protein (TP) of Brasileiro de Hipismo (BH) and Breton mares were studied during pregnancy. A total of 175 healthy mares, varying from 3 to 13 years old were used. Among the animals, 89 were BH mares (14 non pregnant and 75 pregnant) and 86 Breton mares (11 non pregnant and 75 pregnant). The mares were divided into four groups for each breed: control group (non pregnant mares). group 1 (first period of pregnancy, 25-110 days, n=25), group 2 (second period of pregnancy, 111-210 days, n=25) and group 3 (third period of pregnancy, 211-340 days, n=25). The values for erythrocyte, leukocyte were compared with the obtained total protein. Red blood cells count (RBC), packed cell volume (PCV) and haemoglobin concentration (Hb) increased in the second period of pregnancy and decreased in the last period in both the BH and Breton breed, furthermore these same variables were found to significantly higher in the BH breed for non pregnant and pregnant mares during all three gestational periods. The numbers of total leucocytes and segmented neutrophils increased after the second period in both breeds studied.

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Experimental score assessment of the clinical course of infected cornal burn in treatment by various methods

Курский научно-практический вестник «Человек и его здоровье» ◽

10.21626/vestnik/2020-3/07 ◽

2020 ◽

pp. 53-61

Author(s):

Dmitry M. Yarmamedov ◽

Vyacheslav A. Lipatov ◽

Marina V. Medvedeva ◽

Oksana M. Yarmamedova

Keyword(s):

Visual Impairment ◽

Inflammatory Reaction ◽

Comparison Group ◽

Clinical Course ◽

Recovery Period ◽

Control Group ◽

Clinical Recovery ◽

Group 2 ◽

Experimental Group ◽

Group 1

According to WHO data, nowadays at least 2.2 billion people worldwide currently have visual impairment or blindness, of which more than 11.9 million people worldwide have moderate to severe irreversible visual impairment that could be prevented. Objective: to assess the clinical course of a standard infected corneal burn during treatment using combined ophthalmic medicinal films levofloxacin + dexpanthenol and dexamethasone + dexpanthenol from a comparative perspective. Materials and methods. The article investigates the pharmacological activity of five different drug regimens for the treatment of an infected corneal burn in rabbits. Treatment of the first wave began 1 hour after the formation of a standard infected corneal burn. Treatment of the second wave began after the absence of signs of an inflammatory reaction was detected. The clinical course of the standard infected corneal burn was assessed immediately after the formation of the burn and the infection, 1 hour, 2, 3, 5 and 14 days after the experiment started. Results. Clinical recovery began on the 3rd day in experimental group 2 treated with combined ophthalmic medicinal films of levofloxacin 1.5 mg + dexpanthenol 1 p/day. On the 5th day of the experiment, recovery was recorded in the experimental group 1 treated with 1.5 mg levofloxacin-based eye films once a day, as well as in comparison group 2 treated with 0.5% levofloxacin 4 times a day and 5% dexpanthenol 6 times a day. On the 7th day after the formation of a standard infected corneal burn, clinical recovery was recorded in comparison group 1 treated with instillations of levofloxacin 0.5% 4 times a day. In the control group with placebo treatment no conjunctiva inflammatory reaction was recorded on the 14th day of the experiment, however, there was persistent corneal opacity in the form of a spot at the burn site. Conclusions. While treating a standard infected corneal burn, the use of combined ophthalmic medicinal films can shorten the clinical recovery period to 3 days, in comparison with treatment with instillations, where recovery occurred on the 5th day of the experiment.

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The effect of anthelmintic treatment on helminth infection and anaemia

Parasitology ◽

10.1017/s0031182000007113 ◽

2001 ◽

Vol 122 (1) ◽

pp. 105-110 ◽

Cited By ~ 24

Author(s):

D. GILGEN ◽

C.G.N. MASCIE-TAYLOR

Keyword(s):

Iron Supplementation ◽

Haemoglobin Concentration ◽

Trichuris Trichiura ◽

Anthelmintic Treatment ◽

Control Group ◽

Double Blind ◽

Helminth Infections ◽

Group 2 ◽

The Impact ◽

Group 1

A 24-week randomized double blind intervention trial was conducted on adult female tea pluckers from an estate in Bangladesh to investigate the impact of iron supplementation and anthelmintic treatment on changes in ferritin and haemoglobin levels as well as on prevalence and intensity of helminth infections. A total of 553 women were randomly assigned to 1 of 4 intervention groups: group 1 received iron supplementation on a weekly basis, group 2 received anthelmintic treatment at the beginning and half way through the trial, group 3 received both iron supplementation as group 1 and anthelmintic treatment as group 2, and group 4 was a control group and received placebos for both iron supplementation and anthelmintic treatment. Prevalence and intensity of helminth infections (egg counts/g stool) of Ascaris lumbricoides, Trichuris trichiura and hookworms significantly fell in the 2 groups receiving anthelmintic treatment and there were some reductions in the 2 groups not receiving anthelminthic treatment. Haemoglobin and haematocrit concentrations increased significantly in the iron supplemented groups with smaller increases in the anthelmintic only group. All women showed a decrease in serum ferritin levels post-trial with greater losses in the 2 dewormed groups. Significant negative associations were found between hookworm egg counts and ferritin levels and Trichuris trichiura egg counts and haemoglobin concentration.

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Antiurolithiatic effect of Cymbopogon Proximus, Alhagi Maurorum, on Sulfadimidine induced urolithiasis in male New Zealand rabbits

Mansoura Veterinary Medical Journal ◽

10.35943/mvmj.2019.01.107 ◽

2019 ◽

Vol 20 (1) ◽

pp. 12-18

Author(s):

Sameh El-Nabtity

Keyword(s):

New Zealand ◽

Intramuscular Injection ◽

Negative Control Group ◽

Negative Control ◽

Control Group ◽

Aqueous Extracts ◽

Blood And Urine Samples ◽

Group 2 ◽

New Zealand Rabbits ◽

Group 1

The present study aimed to investigate the prophylactic effect of Cymbopogon proximus and Alhagi maurorum on Sulfadimidine induced urolithiasis in rabbits . Thirty New Zealand male rabbits were allocated into six equal groups (each of five): Group (1) was used as a negative control. Group(2) were administered sulfadimidine (200mg/kg) by intramuscular injection.Groups(3) and (4) were administered sulfadimidine(200mg/kg) by intramuscular injection and 330mg/kg of Cymbopogon proximus alcoholic and aqueous extracts respectively orally.Groups(5) and (6) were administered sulfadimidine(200mg/kg) by intramuscular injection and 400mg/kg of Alhagi maurorum alcoholic and aqueous extracts respectively orally. The period of experiment was 10 days. Blood and urine samples were collected from rabbits on the 10th day. The results recorded a significant decrease in serum creatinine, urea, uric acid and crystalluria in Cymbopogon proximus and Alhagi maurorum groups compared to sulfadimidine treated group.We conclude that Cymbopogon proximus and Alhagi maurorum have a nephroprotective and antiurolithiatic effects against sulfadimidine induced crystalluria.

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Influence of Removable Denture Cleaning Agents on Adhesion of Oral Pathogenic Microflora In Vitro: A Randomized Controlled Trial

The Open Dentistry Journal ◽

10.2174/1874210602014010656 ◽

2021 ◽

Vol 14 (1) ◽

pp. 656-664

Author(s):

I.R. Volchkova ◽

A.V. Yumashev ◽

V.V. Borisov ◽

V.I. Doroshina ◽

E.A. Kristal ◽

...

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Candida Albicans ◽

Test Group ◽

Control Group ◽

Removable Dental Prostheses ◽

Removable Denture ◽

Group 2 ◽

Adhesion Index ◽

Group 1

Introduction: Removable dentures are used by 20% of the population. These may be accompanied by denture stomatitis in 15-70% of patients. The choice of the optimal cleansing agent for removable dental prostheses is of high significance. Aim: The aim of our research was to study the influence of removable denture cleansing products on the adhesion of microorganisms and yeast. Materials and Methods: We manufactured 144 specimens of standardized round shape with a diameter of 10 mm from 4 types of modern polymeric materials used by prosthetic dentistry to produce removable dentures, 12 specimens of each material were placed into suspensions of bacterial cultures of Staphylococcus aureus, Escherichia coli, Candida albicans, then into “ClearaSept” (Test group 1), “Рrotefix active cleanser” (Test group 2), saline solution (Control group), followed by nutrient media. The adhesion index was calculated and analyzed. Results: There was no reliable lowering of adhesion index of Staphylococcus Aureus to all materials detected in Test group 1 (U=6, p>0.05 for Bio XS; U=8, p>0.05 for Dental D, Denotokeep Peek, Vertex Rapid Simplified). In Test group 2, the adhesion index of Staphylococcus Aureus reliably decreased to all materials compared to the Control group (U=0, p≤0.01). The adhesion index of Candida albicans and Escherichia coli to all materials in Test group 1 had a minor to moderate reliable reduction compared to the Control group (U=0, p≤0.01). Test group 2 showed a significant reliable decrease in Candida albicans and Escherichia coli adhesion index to all materials in comparison with the Control group (U=0, p≤0.01). Conclusion: The research showed an unreliable or minor and moderate reliable decrease in microorganisms adhesion index depending on the microorganism species after treatment of denture material specimens by antibacterial soap “ClearaSept” and a reliable significant decrease in microbial and yeast adhesion after application of Protefix active cleaner solution, which demonstrates a more significant antimicrobial effect in comparison to “ClearaSept” against Staphylococcus aureus, Escherichia coli, and Candida albicans.

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Effectiveness of lidocaine/prilocaine cream on cardiovascular reactions from endotracheal intubation and cough events during recovery period of older patients under general anesthesia: prospective, randomized placebo-controlled study

BMC Geriatrics ◽

10.1186/s12877-020-01567-y ◽

2020 ◽

Vol 20 (1) ◽

Cited By ~ 1

Author(s):

Linsheng Lv ◽

Lei Yan ◽

Xun Liu ◽

Miaoxia Chen

Keyword(s):

Blood Pressure ◽

General Anesthesia ◽

Older Patients ◽

Recovery Period ◽

Test Group ◽

Control Group ◽

Tube Cuff ◽

Group 2 ◽

Lidocaine Prilocaine ◽

Cardiovascular Reactions

Abstract Background Endotracheal intubation is known to pose significant physiological, pharmacokinetic, and dynamic changes and postoperative respiratory complications in patients under general anesthesia. Method An RCT trial was organized by the Third Affiliated Hospital at Sun Yat-sen University, China. Patients were eligible for inclusion in the trial if they were over 60 years old and had upper-abdominal surgery during the induction of anesthesia and had enrolled in endotracheal intubations. The primary end point included cardiovascular reactions during the induction of anesthesia and endotracheal intubations and cough events during the recovery period. In the test group, 2 g of lidocaine/prilocaine cream (and in the control group, 2 g of Vaseline) were laid over the surface of the tracheal tube cuff. Results The systolic blood pressure (F value = 62.271, p < 0.001), diastolic blood pressure (F value = 150.875, p < 0.001), and heart rate (F value = 75.627, p < 0.001) of the test group were significantly lower than the control group. Cough events during the recovery period in the test group were better (spontaneous cough, χ2 value = 10.591, p < 0.001; induced cough, χ2 value =10.806, p < 0.001). Conclusion In older patients, coughing and cardiovascular reactions under anesthesia and endotracheal intubations were reduced, as a result of using lidocaine/prilocaine cream on the surface of the tracheal tube cuff. Trial registration International Clinical Trials Network NCT02017392, 2013-12-16.

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Dopamine-1 receptor stimulation impairs intestinal oxygen utilization during critical hypoperfusion

AJP Heart and Circulatory Physiology ◽

10.1152/ajpheart.00636.2002 ◽

2003 ◽

Vol 284 (2) ◽

pp. H668-H675 ◽

Cited By ~ 6

Author(s):

Jorge A. Guzman ◽

Ariosto E. Rosado ◽

James A. Kruse

Keyword(s):

Blood Flow ◽

Mucosal Blood Flow ◽

Control Group ◽

Oxygen Utilization ◽

Hemorrhage Control ◽

Receptor Stimulation ◽

Anesthetized Dogs ◽

Group 2 ◽

Increased Susceptibility ◽

Group 1

Effects of a dopamine-1 (DA-1) receptor agonist on systemic and intestinal oxygen delivery (D˙o 2)-uptake relationships were studied in anesthetized dogs during sequential hemorrhage. Control ( group 1) and experimental animals ( group 2) were treated similarly except for the addition of fenoldopam (1.0 μg · kg−1 · min−1) in group 2. Both groups had comparable systemic criticalD˙o 2(D˙o 2crit), but animals in group 2 had a higher gut D˙o 2crit(1.12 ± 1.13 vs. 0.80 ± 0.09 ml · kg−1 · min−1, P < 0.05). At the mucosal level, a clear biphasic delivery-uptake relationship was not observed in group 1; thus oxygen consumption by the mucosa may be supply dependent under physiological conditions. Group 2 demonstrated higher peak mucosal blood flow and lack of supply dependency at higher mucosalD˙o 2 levels. Fenoldopam resulted in a more conspicuous biphasic relationship at the mucosa and a rightward shift of overall splanchnic D˙o 2crit despite increased splanchnic blood flow. These findings suggest that DA-1 receptor stimulation results in increased gut perfusion heterogeneity and maldistribution of perfusion, resulting in increased susceptibility to ischemia.

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Biomarkers of vascular wall damage in patients with cerebrovascular diseases and type 2 diabetes mellitus

Тромбоз, гемостаз и реология ◽

10.25555/thr.2021.2.0977 ◽

2021 ◽

Author(s):

М.А. Быковская ◽

А.А. Раскуражев ◽

А.А. Шабалина ◽

К.В. Антонова ◽

М.М. Танашян

Keyword(s):

Diabetes Mellitus ◽

Type 2 Diabetes ◽

Asymmetric Dimethylarginine ◽

Vascular Wall ◽

Cerebrovascular Diseases ◽

Control Group ◽

Normal Body Mass Index ◽

Group 2 ◽

Group 1

Введение. Сосудистые осложнения сахарного диабета (СД) являются одной из ведущих причин повышения смертности пациентов трудоспособного возраста. Предполагается, что индуцированный гипергликемией окислительный стресс и нарушение антиоксидантной защиты играют роль в патологическом механизме повреждения сосудов, частично за счет влияния оксида азота (NО). Цель исследования: уточнение взаимосвязей в системах асимметричного диметиларгинина (АДМА) и NO у пациентов с цереброваскулярными заболеваниями (ЦВЗ) на фоне СД 2-го типа (СД-2). Материалы и методы. Обследованы 72 пациента с ЦВЗ со стенозирующим поражением внутренней сонной артерии вне острого периода: группу 1 составили 39 пациентов (18 мужчин и 21 женщина) с СД-2 в возрасте 65 [58; 72] лет; в группу 2 вошли 33 больных (15 мужчин и 18 женщин) без СД-2 в возрасте 66 [56; 74] лет. Контрольную группу составили 30 добровольцев (16 мужчин и 14 женщин) без проявлений церебральной ишемии и нарушений углеводного обмена, с нормальными значениями индекса массы тела, некурящие, в возрасте 62 [50; 66] лет. Проводилось клиническое обследование, нейро- и ангиовизуализационное исследование, спектр биохимических исследований крови, в том числе определение содержания АДМА и показателей системы NO. Результаты. В группе 1 содержание нитрата, нитрита и NO составило 62,1 [56; 68] мкмоль/л, 48,5 [26; 52] мкмоль/л и 13,6 [9; 23] мкмоль/л соответственно, что достоверно отличалось от значений этих показателей в группе 2 — 58,3 [45; 64] мкмоль/л, 39,6 [26,0; 42,3] мкмоль/л и 18,7 [16,1; 24,7] мкмоль/л соответственно. Отмечен также более высокий уровень AДМА в крови у пациентов с ЦВЗ в сочетании с СД-2 — 0,42 [0,21; 0,53] ммоль/л. Заключение. Обнаружена взаимосвязь между уровнями AДМА и NO при ЦВЗ на фоне СД-2. Это требует продолжения исследований биомаркеров повреждения сосудистой стенки для определения их места в патогенезе ишемических церебральных осложнений СД-2. Background. Vascular complications of diabetes mellitus (DM) are one of the leading causes of increased mortality in patients of employable age. Hyperglycemia-induced oxidative stress and impaired antioxidant protection have been suggested to play a role in the pathological mechanism of vascular damage, in part due to the effects of nitric oxide (NO). Objectives: clarification of relationships in the systems of asymmetric dimethylarginine (ADMA) and NO in patients with cerebrovascular diseases (CVD) and type 2 diabetes (DM-2). Patients/Methods. We examined 72 CVD patients with stenosing lesions of the internal carotid artery outside the acute period: group 1 consisted of 39 patients (18 men and 21 women; 65 [58; 72] years old) with DM-2; group 2 consisted of 33 patients (15 men and 18 women; 66 [56; 74] years old) without DM-2. The control group consisted of 30 volunteers (16 men and 14 women; 62 [50; 66] years old) without manifestations of cerebral ischemia and carbohydrate metabolism disorders, with normal body mass index, non-smokers. A clinical examination, neuro- and angio-imaging study, a spectrum of biochemical blood tests, including the concentration of asymmetric dimethylarginine (ADMA) and indicators of NO system were carried out. Results. In group 1, the content of nitrate, nitrite and NO was 62.1 [56; 68] μmol/l, 48.5 [26; 52] μmol/l and 13.6 [9; 23] μmol/l, respectively, that significantly differed from the content of these parameters in group 2 — 58.3 [45; 64] μmol/l, 39.6 [26.0; 42.3] μmol/l and 18.7 [16.1; 24.7] μmol/l, respectively. Noted also a higher blood level of ADMA in patients with CVD combined with DM-2 — 0.42 [0.21; 0.53] mmol/l. Conclusions. A relationship was found between ADMA and NO levels in CVD patients with DM-2. This requires further studies of biomarkers of vascular wall damage to determine their place in the pathogenesis of ischemic cerebral complications of DM-2.

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Objective assessment of stiffness in Achilles tendinopathy: a novel approach using the MyotonPRO

BMJ Open Sport & Exercise Medicine ◽

10.1136/bmjsem-2018-000446 ◽

2018 ◽

Vol 4 (1) ◽

pp. e000446 ◽

Cited By ~ 3

Author(s):

Gafin Ericson Morgan ◽

Rhodri Martin ◽

Lisa Williams ◽

Owen Pearce ◽

Keith Morris

Keyword(s):

Dynamic Stiffness ◽

Objective Assessment ◽

Weight Bearing ◽

Achilles Tendinopathy ◽

Control Group ◽

Asymptomatic Group ◽

Musculotendinous Junction ◽

Significant Difference ◽

Group 2 ◽

Group 1

ObjectivesThe aim of this study was to establish quantitative values for asymptomatic and symptomatic Achilles tendons.DesignCohort study with a single (cross-sectional) time point of patients diagnosed with unilateral Achilles tendinopathy and an asymptomatic group with comparative homogeneity.MethodsA sample of 50 participants: 25 diagnosed with symptomatic unilateral Achilles tendinopathy (AT group) and 25 with asymptomatic Achilles tendons (control group 2). The asymptomatic side of the AT group was used as a control (control group 1). Measurements at 2 cm intervals on the tendon from its insertion at the calcaneum up to the musculotendinous junction were taken non-weight bearing (NWB) and weight bearing (WB) using the MyotonPRO.ResultsThere was a significant (p<0.005) decrease in natural oscillation frequency (F) at points 2, 3 and 4 of the AT group (NWB condition) and points 2 and 3 for the WB condition. There was a significant (p<0.005) increase in logarithmic decrement (D) at points 2 and 3 signifying a decrease in elasticity. Dynamic stiffness (S) was significantly (p<0.005) reduced in the AT group at points 2 and 3 WB and point 3 WB. There was no significant difference in creep (C) observed between the symptomatic and asymptomatic tendons. There was a significant (p<0.005) increase in mechanical stress relaxation time (R) at point 2 NWB.There was a correlation between body weight and gender on tendon mechanics, with the symptomatic tendons. No significant differences were observed between the control group 1 and control group 2.ConclusionsThe MyotonPRO measured decreased stiffness over a section of the tendon corresponding clinically with Achilles tendinopathy. This may have potential in identifying risk of injury and informing rehabilitation, however further extensive research is required to generate baseline data for specific population groups monitoring variables over time. Age, gender and body mass index appear to have some bearing on the mechanical properties of the tendon but mainly in the tendinopathy group.

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Changes in Higher Order Aberrations after Wavefront-Guided Prk for Correction of Low to Moderate Myopia and Myopic Astigmatism: Two-Year Follow-Up

European Journal of Ophthalmology ◽

10.1177/112067210701700405 ◽

2007 ◽

Vol 17 (4) ◽

pp. 507-514 ◽

Cited By ~ 14

Author(s):

D. Wygledowska-Promienska ◽

I. Zawojska

Keyword(s):

Visual Acuity ◽

Excimer Laser ◽

Spherical Aberration ◽

Higher Order ◽

Control Group ◽

Higher Order Aberrations ◽

Order Root ◽

Group 2 ◽

Myopic Astigmatism ◽

Group 1

Purpose To assess efficacy, safety, and changes in higher order aberrations after wavefront-guided photorefractive keratectomy (PRK) in comparison with conventional PRK for low to moderate myopia with myopic astigmatism using a WASCA Workstation with the MEL 70 G-Scan excimer laser. Methods A total of 126 myopic or myopic-astigmatic eyes of 112 patients were included in this retrospective study. Patients were divided into two groups: Group 1, the study group; and Group 2, the control group. Group 1 consisted of 78 eyes treated with wavefront-guided PRK. Group 2 consisted of 48 eyes treated with spherocylindrical conventional PRK. Results Two years postoperatively, in Group 1, 5% of eyes achieved an uncorrected visual acuity (UCVA) of 0.05; 69% achieved a UCVA of 0.00; 18% of eyes experienced enhanced visual acuity of −0.18 and 8% of −0.30. In Group 2, 8% of eyes achieved a UCVA of 0.1; 25% achieved a UCVA of 0.05; and 67% achieved a UCVA of 0.00 according to logMAR calculation method. Total higher-order root-mean square increased by a factor 1.18 for Group 1 and 1.6 for Group 2. There was a significant increase of coma by a factor 1.74 in Group 2 and spherical aberration by a factor 2.09 in Group 1 and 3.56 in Group 2. Conclusions The data support the safety and effectiveness of the wavefront-guided PRK using a WASCA Workstation for correction of low to moderate refractive errors. This method reduced the number of higher order aberrations induced by excimer laser surgery and improved uncorrected and spectacle-corrected visual acuity when compared to conventional PRK.

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