scholarly journals Prismatic correction in the presence of acutely acquired esotropia with diplopia

2021 ◽  
pp. 46-51
Author(s):  
G.V. Gladysheva ◽  
◽  
I.L. Plisov ◽  
N.G. Antsiferova ◽  
V.B. Pushchina ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Case Management ◽  
Binocular Vision ◽  
Stereoscopic Vision ◽  
Deviation Angle ◽  
Color Test ◽  
Single Vision ◽  
Binocular Single Vision ◽  
Test Color ◽  
Group 1

Purpose. To analyze changes in binocular vision functions in patients with acutely acquired esotropia after preoperative correction by prisms. Material and methods. The study included 16 patients with acutely acquired esotropia with diplopia. Depending on the tactics of preoperative case management, two groups were distinguished. Eight patients with acutely acquired esotropia of the Bielshowsky type at the age from 12 to 35 years old (mean age, M±sd – 17.5±1.9 years). This group underwent preoperative prismatic correction of diplopia and the deviation angle, as well as eight patients with acutely acquired esotropia of the Bielshowsky type at the age from 12 to 35 years (18.5±1.9 years). Patients in this group underwent surgery without prior prismatic correction. Fresnel prisms were used to select and assign prismatic correction. The patients were monitored dynamically. Results. In the course of treatment 1 group (prismatic correction followed by surgical correction) according to the indicator of Worth's four-dot test color test, revealed a statistically significant increase in the frequency of value of the binocular single vision (p=0.041), the frequency of the presence of stereovision according to the Fly-test (p=0.013), fusion amplitude in the distance by 1.11 times (p=0.033) and near fusion amplitude by 1.15 times (p=0.003). Significant differences between the groups were observed only in the frequency of stereovision presence according to the Fly-test after treatment, which was 2.0 times higher in group 1 (p=0.041). Conclusion. Prismatic correction in combination with surgical treatment had better curative benefits than surgery itself in improving both binocular and stereoscopic visual functions. Key words: acutely acquired esotropia, diplopia, binocular vision, stereoscopic vision, Fresnel prisms

Prismatic stage of treatment of patients in acute acquired esotropia with diplopia

2021 ◽  
pp. 124-127
Author(s):  
G.V. Gladysheva ◽  
◽  
I.L. Plisov ◽  
N.G. Antsiferova ◽  
D.R. Mamulat ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Case Management ◽  
Key Words ◽  
Binocular Vision ◽  
Deviation Angle ◽  
Color Test ◽  
Visual Functions ◽  
Single Vision ◽  
Binocular Single Vision ◽  
Test Color

Purpose. To analyze changes in binocular vision functions in patients with acutely acquired esotropia after preoperative correction by prisms. Material and methods. The study included 10 patients with acutely acquired esotropia with diplopia. Depending on the tactics of preoperative case management, two groups were distinguished: 1 - 5 patients, this group underwent preoperative prismatic correction of diplopia and the deviation angle, 2 - 5 patients, in this group underwent surgery without prior prismatic correction. Fresnel prisms were used to select and assign prismatic correction. The patients were monitored dynamically. Results. In the course of treatment 1 group according to the indicator of Worth's four-dot test color test, revealed a statistically significant increase in the frequency of value of the binocular single vision (p=0.041), the frequency of the presence of stereovision according to the Fly-test (p=0.013). Conclusion. Prismatic correction in combination with surgical treatment had better curative benefits than surgery itself in improving binocular and stereoscopic visual functions. Key words: acutely acquired esotropia, binocular vision, Fresnel prisms.

scholarly journals Convergence Insufficiency - Perception Error: A Review Article

2020 ◽  
Vol 4 (2) ◽  
Keyword(s):  
Binocular Vision ◽  
Reading Performance ◽  
Vision Disorders ◽  
Eye Care ◽  
Visual Discomfort ◽  
Convergence Insufficiency ◽  
Single Vision ◽  
Vision Assessment ◽  
Proper Diagnosis ◽  
Binocular Single Vision

Ocular asthenopia associated with headaches and visual discomfort are the major complaints, clients have these days. Intensive near and digital works have brought many non-strabismic binocular vision disorders (NSBVD) in the clients. Convergence insufficiency (CI) is one of the most prevalent NSBVD. CI is a binocular vision dysfunction, characterized by the patient’s inability to accurately converge, or sustain accurate convergence when focusing on near objects. Apart from visual symptoms, CI is known to have effects on a children’s academics and a person’s daily life. In addition to visual discomfort, children with CI report symptoms affecting reading performance, such as loss of pace, loss of concentration, reading slowly, and trouble remembering what was read. Proper diagnosis of convergence insufficiency is simple, but it has been complicated by the unavailability of essential orthoptic tools; the attitude of practitioner and their knowledge adds to the hurdle. Why don’t we introduce term “CI Suspect” like “Glaucoma-Suspect” so that every individual if matches one or more criteria for CI diagnosis is subjected undergo a complete binocular single vision assessment? This will properly diagnose and manage the case and also make orthoptics as a proper sub-specialty for eye care practitioners.

Evaluation of Fusion and Stereopsis in Anisometropic Patients

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Rana Mohamed Ahmed ◽  
Hazem Hosny Noah ◽  
Walid Mohamed El Zawahry ◽  
Ahmed Taha Ismail
Keyword(s):  
Binocular Vision ◽  
Monocular Vision ◽  
Three Dimension ◽  
Single Vision ◽  
Significant Difference ◽  
The World ◽  
Binocular Single Vision ◽  
Acuity Test ◽  
Stereo Acuity

Abstract Background Binocular vision has many important advantages on monocular vision as it helps in determination of the distance of an object, gives much greater depth of perception, and the ability to have stereopsis and view the world in three dimension (3D). There is an evidence that binocular vision is present in many patients with anisometropia even who have amblyopia but with grades lower than normal. Purpose This study evaluates the effect of anisometropia on BSV functions. Method sixty-four patients above 6 years with anisometropia equal to or more than 2.5D never had their vision corrected either by glasses or refractive surgeries or went on patching treatment, Anisometropic patients were devided into two groups amblyopic group (AA) and non-amblyopic group (NA) were examined for assessing their fusion by Worth four dot test and their stereopsis by fly test (Titmus stereo acuity test) by their best corrective glasses based on their cycloplegic refraction. Results Anisomyopes shows better stereopsis 62% of them and better fusion 65% of them than anisohypropes which had only 8% with good stereopsis and 32% with good fusion. However, antimetropes showed bad fusion and stereopsis as all of the five cases have amblyopia. Only 29.5% of anisomyopes have amblyopia but 68% of anisohypropes have amblyopia. As regard worth four dot test (P < 0.001), as 90.6% of cases with amblyopia had suppressed eye but only 9.4 % of this amblyopic cases had normal fusion. However, in patients without amblyopia 15.6% had suppressed eyes but 84.4% had normal fusion. As regard Titmus test there was statistically significant difference between both groups (P < 0.001), as 100 % of cases with amblyopia had bad stereo acuity but 28.1% of patients without amblyopia had defect in their stereo acuity. Conclusion Fusion and stereopsis as binocular single vision functions were significantly affected in AA patients with best-corrected anisometropic glasses than in NA patients.

scholarly journals On the Origins of Terms in Binocular Vision

i-Perception ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 204166952199238
Author(s):  
Nicholas J. Wade
Keyword(s):  
19Th Century ◽  
Binocular Vision ◽  
Early 19Th Century ◽  
Single Vision ◽  
Binocular Single Vision

Vision with two eyes has been commented upon for many centuries, and the principal concern has been with binocular single vision. The terminology we apply to binocular vision developed rapidly after the invention of the stereoscope in the early 19th century. The origins of terms such as anaglyph, binocular lustre, chromatic stereoscope, cyclopean eye, dichoptic, horopter, pseudoscope, rivalry, stereoscope, stereograph, and stereopsis are described together with portraits of those who introduced them.

Image Processing Based on Three-Dimensional Stereo Vision

2014 ◽  
Vol 556-562 ◽  
pp. 5017-5020
Author(s):  
Ting Ting Wang
Keyword(s):  
Image Processing ◽  
Binocular Vision ◽  
Stereo Vision ◽  
Error Rate ◽  
Three Dimensional ◽  
Processing Method ◽  
Stereoscopic Vision ◽  
Average Error ◽  
Traditional Model ◽  
Average Error Rate

Three-dimensional stereo vision technology has the capability of overcoming drawbacks influencing by light, posture and occluder. A novel image processing method is proposed based on three-dimensional stereoscopic vision, which optimizes model on the basis of camera binocular vision and in improvement of adding constraints to traditional model, moreover ensures accuracy of later location and recognition. To verify validity of the proposed method, firstly marking experiments are conducted to achieve fruit location, with the result of average error rate of 0.65%; and then centroid feature experiments are achieved with error from 5.77mm to 68.15mm and reference error rate from 1.44% to 5.68%, average error rate of 3.76% while the distance changes from 300mm to 1200mm. All these data of experiments demonstrate that proposed method meets the requirements of three-dimensional imageprocessing.

Features of surgical treatment of Brown's syndrome in children

2021 ◽  
pp. 11-16
Author(s):  
N.A. Malinovskaya ◽  
◽  
E.V. Semyonova ◽  
A. Toriya ◽  
P.A. Nikonorova ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Conservative Treatment ◽  
Binocular Vision ◽  
Rectus Muscle ◽  
Oblique Muscle ◽  
Double Vision ◽  
Inferior Rectus ◽  
Inferior Oblique Muscle ◽  
Straight Position ◽  
Third Stage

Purpose. To study the features of surgical treatment of Brown's syndrome in children. Material and methods. 47 children with Brown's syndrome aged from one to 10 years were treated: 4 children had bilateral form, 43 had congenital form and 4 had acquired form. The operation was performed for 44 children. The indications for surgical treatment were double vision in a straight position, forced position of the head, impaired binocular vision. Results. Three children with acquired Brown's syndrome had a positive effect on the background of conservative treatment. Surgical treatment of Brown's syndrome was effective, but often required repeated interventions (31 patients, 70%): the first stage was weakening of the superior oblique muscle (tenotomy, recession, prolongation), the second stage was recession of the inferior oblique muscle, the third stage was recession of the contralateral inferior rectus muscles (4 patients, 9%). In a number of cases (5 children, 11%), at the outcome of surgical treatment, asymmetry of the palpebral fissures was noted due to mild enophthalmos in the operated eye (the result of weakening of the oblique muscles that «pull» the eyes out of the orbit and weakening of the contralateral inferior rectus muscle that «tightens» the eyeball). Conclusion. Surgery for Brown's syndrome is effective, but often requires reoperation. With acquired forms of Brown's syndrome, examination and the first stage of conservative treatment are required. The absolute indications for surgical treatment of Brown's syndrome are forced head position, double vision in a straight position and impaired binocular vision. Keywords: Brown's syndrome, double vision in a straight position, forced position of the head, impaired binocular vision, surgical treatment.

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