bluuebunny/crossref_metadata_2025_split huggingface dataset:
Сorrection of Corneal Astigmatism in Patients with a Thin Cornea by Improved Combined Technology
Authors: Stroyko M. S. , Kostenev S. V. , Pakhomova A. L. 
Published: July 2018

Purpose:to carry out an advanced combined technology, including femtosecond astigmatic keratotomy and topographically-oriented photorefractive keratectomy in order to correct corneal astmigmatism in patients with a thin cornea. Presentation and evaluation of the results of this observation.Patients and methods. There are data of 19 patients (30 eyes) with complex myopic astigmatism combined with a thin cornea who received the operation of femtosecond astigmatic keratotomy (the first stage of an improved combined technology). Mean values before surgery: sph –4.1 ± 2.1 (from –0.3 to –7.8) D, cyl –4.9 ± 1.4 (–3.0 to –7.3) D, UDVA 0.1 ± 0.05 (from 0.01 to 0.2) of the rows of table, CDVA 0.6 ± 0.1 (from 0.4 to 0.9) of the rows of table, Kmax 46.70 ± 1.1 (from 44.50 to 48.50), Kmin 42.8 ± 1.3 (from 40.00 to 44.00), the thickness of the cornea is 470.0 ± 12.7 (from 4470 to 495.0) μm. The second stage: topographically oriented photorefractive keratectomy was performed to the same patients with the aim of correcting residual ametropy. Mean values before surgery: sph –5.3 ± 2.0 (from –1.8 to –8.8) D, cyl –1.6 ± 0.8 (from –0.5 to –3.0) D, UDVA 0.3 ± 0.1 (from 0.1 to 0.6) rows of the table, CDVA 0.7 ± 0.1 (from 0.5 to 0.9) rows of the table, Kmax 46.70 ± 1.1 (from 44.50 to 48.50), Kmin 42.8 ± 1.3 (from 40.00 to 44.00), the thickness of the cornea 464.3 ± 8.3 (from 460.0 to 485.0). All patients from the study received a diagnostic examination by standard and special methods based on the S. Fyodorov Eye Microsurgery State Institution, a screening of the keratoconus on the scanning topograph Pentacam HR “Oculus Optikgerate GmbH”, Germany was carried out. The first stage of the advanced combined technology was used the LenSx Laser (“Alcon”, USA), the second stage — WaveLight EX-500 (“Alcon”, USA), was used.Results. After the completion of two stages of improved combined technology the following results were obtained: reduction of the sph with –4.1 ± 2.1 (from –7.8 to –0.3) to –0.4 ± 0.3 (from –1.0 to 0.0), cyl with –4.9 ± 1.4 (from –7.3 to –3.0) to –0.1 ± 0.1 (from –0.5 to 0.0), Kmax from 44.70 ± 1.1 (from 44.50 to 48.50) to 37.8 ± 1.6 (from 36.00 to 43.00), Kmin 42.80 ± 1.3 (from 40.00 to 44.00) to 37.00 ± 1.3 (from 36.00 to 40.00), CDVA growth with 0.6 ± 0.l (from 0.4 to 0.9) to 0.8 ± 0.1 (from 0.5 to 1.0), UDVA from 0.1 ± 0.05 (from 0.01 to 0.2) to 0.7 ± 0.1 (from 0.4 to 0.9).Conclusion. The improved combining technology, including femtosecond astigmatic keratotomy and topographically — oriented photorefractive keratectomy is effective and safety technology, allowing to correct of corneal astigmatism in patients with a thin cornea.
On the Possibility of Expanding Indications for Refractive Correction of Ametropia (4 Clinical Cases)
Authors: Chuprov A. D. , Kanyukova Yu. V. , Voronina A. E. 
Published: July 2018

Refractive surgery is a dynamically developing field of ophthalmic surgery, which requires studying new approaches for determining indications and contraindications for refractive surgery.Purpose. To investigate the possibility of expanding indications for refractive surgery in conditions related to contraindications on the example of four clinical cases.Material and methods. The study included 4 clinical cases of photorefractive operations in patients with relative contraindications who underwent refractive surgery (Femto-Lasik, photorefractive keratectomy (PRK), phototherapeutic keratectomy (PTK)).Results and discussion. Follow-up period of patients after Femto-Lasik, PRK and PTK was 1 year. During this period, stabilization of such parameters as intraocular pressure (IOP), progression of diabetic retinopathy, visual acuity was detected on all operated eyes. There were no postoperative complications. In the first clinical example, to avoid flap injury pneumotonometry was performed 72 hours after the surgery. IOP indices differed from preoperative ones and were 15 mm Hg because of the flap cut and the removal of part of the corneal tissue as a result of laser ablation. In the second clinical example, BCVA OU was 1.0 throughout the whole follow-up period. In the third clinical example recurrence of retinal detachment and any formations of new zones of peripheral vitreochorioretinal were not observed. BCVA improved up to 0.9–1.0. In the fourth clinical example, 3 months later, the patient complained for “misting” in the right eye. On examination, subepithelial fibroplasia of the 1st degree was revealed. After the course of treatment, the transparency of the cornea was restored. The data of the diagnostic examination after the surgery at the period of 1 month, 3 months did not differ and corresponded to preoperative ones. Diagnostic examination data 1 year after the operation: visual acuity: OD — 1.0; OS — 0.4 sph + 1.0Dcyl + 1.5Dax 45 = 0.8.Conclusion. The presented clinical examples allow us to reconsider the list of relative contraindications for performing refractive operations for compensated diabetes mellitus, glaucoma, retinal detachment, corneal opacities, as it can be performed safely and effectively with good refractive results.
Varieties of Constantly Redundant Tension of Accommodation, the Weakness of Accommodation and Intraocular Pressure in Myopia
Authors: Trufanova L. P. , Balalin S. V. 
Published: July 2018

Purpose: to evaluate the relationship between the functional state of the accommodative eye apparatus according to the data of accomodography and the increase of the ophthalmotonus in patients with myopia.Patients and methods. There were 74 patients with myopia (148 eyes) from 6 to 17 years old. The mean age of the examined subjects was 12.7 ± 0.32 years. Low myopia was detected in 37 persons (73 eyes), medium myopia — in 23 persons (46 eyes) and high myopia — in 15 persons (29 eyes). Progressive myopia was detected in 110 eyes (74.3%), stationary — 38 eyes (25.7%). Constantly redundant tension of accommodation (CRTA) was found in patients on 134 eyes (90.5%).Results. In 53% patients with progressive myopia (58 eyes) the cornea-compensated intraocular pressure (P0CC) was within the limits of the upper individual norm — from 18 to 21 mm Hg or higher. In progressive myopia with combination of accommodation weakness, CRTA and an increase of IOP up to the range of upper norm limits occurs in 4.8 times more often than with stationary myopia (t = 4.7, p < 0.05).Сonclusions. It is necessary to measure intraocular pressure in patients with myopia taking into account the biomechanical properties of the sclera in case of accomodation arrors in the form of a combination of accommodation weakness and CRTA. The combination of accommodation weakness, CRTA and elevated IOP (upper-range) indicates the progression of myopia.
Value of Confocal Microscopy of the Cornea in Assessment of the Adaptation Period at Patients with Myopia when Using Orthokeratological Lenses
Authors: Ezhova E. A. , Melikhova I. A. , Balalin S. V. 
Published: July 2018

Purpose: tо study the histomorphological state of the cornea with the help of confocal microscopy in patients with myopia in the period of adaptation to orthokeratological contact lenses (OCL).Patients and methods. The study of the histomorphological status of the cornea was performed in the central optical, middle peripheral and perilimbal zones using confocal microscopy (ConfoScan-4) in 72 patients (144 eyes) with low myopia (38 people, 76 eyes) and middle myopia (34 persons, 68 eyes) after the appointment of OCL within 1 to 12 months.Results. The maximum significant increase in the degree of epithelial changes in the central optical zone of the cornea was recorded after 7 days of the application of OCL and an increase of nerve fibers activation, the number of activated keratocytes — after 1 month. There were noted the degree of changes in the epithelium, the number of activated keratocytes after 1 month and the degree of activation of nerve fibers after 3 months in the middle peripheral zone of the cornea. At a period of 12 months of the using of OCL in the central optical zone and middle peripheral zone of the cornea the index of the degree of changes in the epithelium, nerve fibers, and the number of activated keratocytes was stabilized. In the perilimbal zone of the cornea the histomorphological parameters did not differ from the initial data at the observation periods, except for innervation. The densities of keratocytes in various layers of the stroma, endothelial cells did not change statistically throughout the study.Conclusions. The results of the histomorphological indices made it possible to single out a “stressful” period of adaptation lasting 1 month, a transitional period of 1 to 3 months and a stable adaptation period, the formation of which was noted after 12 months of the application of OKL. Stable densities of keratocytes in various layers of the corneal stroma, endothelial cells during the entire period of observation indicated a fairly good tolerability of OCL.
Non-Invasive Diagnosis of Polypoidal Choroidal Vasculopathy as a Variant of the Course of Age-Related Macular Degeneration
Authors: Panova I. E. , Shaimov T. B. , Shaimova V. A. 
Published: July 2018

Purpose: to study noninvasive diagnostic options for polypoidal choroidal vasculopathy (PCV) — a subtype of neovascular agerelated macular degeneration — by monitoring clinical progression, defining optical coherence tomography (OCT) findings specific for PCV and evaluating diagnostic utility of OCT angiography.Patients and methods. The study included 254 patients (292 eyes) with neovascular age-related macular degeneration. All patients underwent complex eye examination: visual acuity test, slit lamp biomicroscopy, ophthalmoscopy with 60 and 78D fundus lenses, fundoscopy with color filters, spectral-domain OCT, OCT angiography and biometry. Fluorescein angiography was performed in 66 cases. Indocyanine green angiography was employed in 16 patients with PCV. All statistical analyses were performed with IBM SPSS Statistics 19 software package.Results. In 14 of 16 patients (87.5%) indocyanine green angiography revealed round hyperfluorescent lesions which corresponded to ophthalmoscopy findings — subretinal reddish orange nodules localized primarily in the parafovea. In 11 cases (68.8%) the nodules were associated with hemorrhage and in 14 cases (87.5%) — with hard yellowish exudates. Comparative analysis of retinal anatomy allowed for defining typical OCT signs of PCV that distinguish the clinical entity from type 1 and 2 choroidal neovascular membranes: neurosensory retinal detachment in the parafovea (80.0%, p < 0.001) and hard exudates (71.9%, p < 0.001). OCT findings characteristic of PCV are dome-shaped pigment epithelium detachment (100%), bubble sign (94.74%), notch sign (68.4%) and double layer sign (92.9%).Conclusion. Noninvasive diagnosis of polypoidal choroidal vasculopathy should encompass clinical signs, fundoscopy findings, OCT-based morphometry and OCT angiography criteria. OCT angiography has high diagnostic value and enables detection of branching vascular network and polypoidal formations.
Laser Speckles in Anisometropic Amblyopia Treatment
Authors: Matrosova Y. V. , Fabrikantov O. L. 
Published: July 2018

Purpose. To perform the comparative efficacy assessment of complex treatment for average degree anisometropic amblyopia in children using red, green laser speckles and their combination.Patients and methods. 216 children aged 5–9 years old with anisohypermetropia and anisometropic amblyopia of average degree were followed up. Cycloplegic refraction of sighting eye was from +1.5 to +3.0 D, of the amblyopic one — from +3.5 to +8.5 D. All patients underwent the basic treatment course using magnetostimulation and computer programs. Depending on the applied laser the children were divided into three groups: patients of group I underwent the basic course of pleoptics using laser in the red wavelength range, in patients of group II the basic course was supplemented with laser stimulation in the green wavelength range, group III — along with the basic treatment the alternate stimulation by red and green speckles was used, control group IV — received only basic course without any laser stimulation. The best corrected visual acuity before and after the treatment was estimated.Results. Before treatment there were no any significant differences between groups according to age, refraction and best corrected visual acuity. As a result of treatment we received the reliable increase in visual acuity in all groups. The minimum increase was noted in patients who received the basic course of treatment, 15% increase was noted in patients stimulated with green speckle, in patients who underwent red speckle stimulation visual acuity increased by 27%, the maximum increase in visual acuity was achieved in patients who received the combined stimulation by red and green speckles.Conclusion. The paper has proved the high efficacy of combined application of red and green speckles in pleoptic treatment in comparison with their separate usage and traditional basic course.
The Effectiveness of Different Optical Correction Methods in Children and Adolescents with Progressive Myopia Based on a Comparative Evaluation of the Accommodation and Axial Length of Eyes
Authors: Sitka M. M. , Bodrova S. G. , Pozdeyeva N. A. 
Published: July 2018

Objective: to determine optimal method of progressive myopia optical correction in children and adolescents.Patients and methods. Conducted 5-year prospective clinical and instrumental examination of 494 children with myopia using orthokeratology lenses, soft contact lenses and glasses. 61 children (the average age 11.7 ± 2.36 years) with myopia –2.87 ± 1.1 D and astigmatism –0.58 ± 0.27 D used orthokeratological lens. 92 children (the average age 12.8 ± 1.51 years) with myopia –3.66 ± 1.07 D, astigmatism –0.53 ± 0.18 D wore soft contact lens. 79 children (the average age 11.52 ± 1.78 years) with myopia –1.59 ± 1.08 D, astigmatism –0.71 ± 0.54 D used glasses with monofocal lenses, with full correction. The control group consisted of 249 children (the average age 9.1 ± 1.14 years) with initial emmetropia. Determination of refraction, subjective and objective determination of accommodation, and axial length of the eye (“IOL-master”) was conducted in children.Results. The maximum progression of myopia was observed in younger children (8–9 years). Correction of myopia with orthokeratology lenses (OKLs) was accompanied by the lowest dynamics of changes in axial length (axial elongation 0,44 ± 0,32 mm) compared to the correction with soft contact lenses (SCLs) (axial elongation 0,73 ± 0,36 mm), spectacle correction (axial elongation 1,39 ± 0,47 mm) and the control group (axial elongation 0,6 ± 0,41 mm). In all children with myopia, at the beginning of the study, there were reduced values reserve of relative accommodation and an objective accommodative response. Correction of myopia with OKLs (p = 0,0002) and SCLs (p = 0,036) provides the normalization of subjective and objective reserve indication of relative accommodation in both age group in comparison of spectacles correction.Conclusion. Correction with orthokeratology lens in children with progressive myopia contributes to the minimum growth length of the eye. Correction of myopia OKLs and MKL improves of subjective and objective indicators of relative accommodation reserve.
Instillation Anesthesia in Refractive Surgery in Children
Authors: Shchuko A. G. , Khlebnikova L. C. , Oleshenko I. G. , Iureva T. N. , Pisarevskaya O. V. , Frolova T. N. 
Published: July 2018

Purpose: to evaluate the safety and clinical efficacy of the Femto-LASIK refractive surgery performed under local (topical) anesthesia in children and adolescents with anisometropic and refractive amblyopia against a background of mixed astigmatism, medium and high hypermetropia with hypermetropic astigmatism.Patients and methods: 28 children (28 eyes) aged from 7 to 16 years (av. age — 13.6 ± 2.1 years old) were operated under local anesthesia by the FemtoLASIK method. The degree of anisometropy was from 3.25 to 5.21 (average — 4.27 ± 0.53 D). Uncorrected visual acuity averaged 0.21 ± 0.07, corrected one — 0.41 ± 0.1. Psychological history of patients and readiness for operative treatment of the disease were found out during the diagnostic examination. Based on the Spielberger-Khanin technique, the level of personal and reactive anxiety was determined, allowing identifying patients for surgical intervention under topical anesthesia. The surgeon assessed the comfort of the operation. During the first postoperative examination, the developed questionnaire was used to assess the comfort level of the patient during surgical treatment.Results. During the surgical intervention and in the postoperative period there were no complications. The behavior of all patients during the operation can be considered adequate. The duration of the operation slightly exceeded the duration of FemtoLASIC in adults. Uncorrected visual acuity in the first day after the operation averaged 0.39 ± 0.08, in 6 months — 0.61 ± 0.1, which is 80% higher than the baseline indices. After 6 months, the equivalent of anisometropia was 0.69 ± 0.12 D, that is, the refraction of the operated eye approached the value of the paired eye. In 60.8% of patients, the sensations during the operation corresponded to the level of “comfortable”. The surgeon’s assessment of the conditions for performing operations as ‘satisfactory” was noted in 92.9%.Conclusion. The use of topical anesthesia in refractive surgery in children with an initially low level of anxiety is an effective, safe and predictable method of anesthesia, allowing to conduct surgery in comfortable conditions for both the patient and the surgeon, with a high functional result.
ADAPTIVE IMAGE WATERMARKING USING DISCRETE WAVELET TRANSFORM, SINGULAR VALUE DECOMPOSITION AND AUTOMORPHISM
Authors: Mishra Om Narayan , Shukla Shailja 
Published: July 2018

Watermarking is a method to hide the image efficiently into any covering object (image in our case) so no intruder can interpret it by any means. Proposed work is a new design of image watermarking which include pre-processing of cover image with Discrete Wavelet Transform (DWT) and Singular Value Decomposition (SVD). Proposed work using an alphanumeric key which initially modifies the watermark using simple ‘XOR’ operation, and at the receiver end this key must be there so that receiver can extract the watermark. Proposed work is also using torus Automorphism which initially changes the watermark into a scramble format which cannot be recognised as original watermark.
A SOLUTION TO SELECTIVE FORWARD ATTACK IN WIRELESS SENSOR NETWORK
Authors: Singh Gulbir , Dubey Om Prakash , Kumar Gautam 
Published: July 2018

Purpose of Study: Wireless mesh network represents a solution to provide wireless connectivity. There are some attacks on wireless sensor networks like black hole attack, sinkhole attack, Sybil attack, selective forwarding, etc. In this paper, we will concentrate on a selective forwarding attack. Selective Forwarding Attack is one of the many security threats in wireless sensor networks that can degrade network performance. An adversary on the transmission path selectively drops the packet. The adversary same time transfers the packet, while on a few occasions it drops the packet. It is diﬃcult to detect this type of attack since the packet loss may be due to unreliable wireless communication. The proposed scheme is based on the trust value of each node. During data transmission, a node selects a downstream node that has the highest trust value, which is updated dynamically based on the number of packets a node has forwarded and dropped.
Methodology: A comparative methodology is used in all existing schemes. We compared our scheme with the existing scheme and found that the packet loss in the proposed scheme is much less than the existing scheme.
Result: We showed that our scheme essentially detects malicious nodes for each possible scenario. Regarding communication overhead, our scheme is more efficient than typical multipath schemes. Also, by utilizing an existing routing protocol which is secure against sinkhole attacks, our scheme also provides security against sinkhole attacks.
AUDIO WATERMARKING WITH ANGLE QUANTIZATION BASED ON DISCRETE WAVELET TRANSFORM AND SINGULAR VALUE DECOMPOSITION
Authors: Chadar Divya , Shukla Shailja 
Published: July 2018

An audio watermark is a unique electronic identifier embedded in an audio signal, typically used to identify ownership of copyright. Proposed work is a new method of audio watermark hiding inside another bigger cover standard audio cover. The method includes ‘harr’ wavelet based Discrete Wavelet Transform decomposition of frequencies hence the audio samples of watermark gets hidden only those parts of cover audio where human ears are less sensible according to Human Auditory System. Proposed method also includes the Singular Value Decomposition, which is required for making our method robust against the various communication of processing attacks like compression, filtering, fading or noise addition. Proposed work is also using the concept of angular modulation which initially modifies the audio watermark in to provide extra security and also extra robustness in communication. The design is been develop on MATLAB 2013b version and verification of design o the same.
Editorial
Authors: Neves Larissa de Oliveira 
Published: July 2018

Este é o número de lançamento da Pitágoras, 500, revista de estudos teatrais do Departamento de Artes Cênicas do Instituto de Artes da Unicamp. A revista, que tem por objetivo veicular artigos e pesquisas ligados ao teatro, abre com um número especial temático, apresentando artigos que versam sobre Dramaturgia e contando com a participação de colaboradores convidados.
BODY IMAGE BERHUBUNGAN DENGAN INDEKS MASSA TUBUH, TAPI TIDAK DENGAN WAIST TO HIP RATIO PADA VEGETARIAN PUTRI DI SURABAYA
Authors: Siwi Anastasia Prastiwi Switeng Siwi , Nindya Triska Susila 
Published: July 2018

Dissatisfaction with body shape are common among young women. Therefore, they always trying to get their ideal body shape. One of the effort to get ideal body shape is applying vegetarian diet. This study aimed to analyze the association between body image and body mass index ( BMI) and waist to hip ratio (WHR) among young women vegetarian. The study was a cross sectional with quantitative approach among 32 young women vegetarian in Surabaya. The body image perception was obtained using a questionnaire. The nutritional status was obtained from weight and height measurement, and WHR was obtained by measuring waist and hip circumference. This study showed that as many as 23 respondents (71.9%) had a positive perception of body image, as many as 22 respondents (68.7%) had WHR <0.8 cm, and a total of 19 respondents (59.3%) had a normal BMI. There was an association between body image and BMI (p=0.014), but there was no association between b ody image and WHR (p=0.653). This study conclude that b ody image is associated to BMI but not WHR