Scientific Program

Conference Series Ltd invites all the participants across the globe to attend World Congress and Expo on Optometry and Vision Science
(10 Plenary Forums - 1Event) Chicago,USA.

Day 3 :

  • Cataract and Refractive Surgery

Session Introduction

Sergio Ozan

CEPROC Centro Prótesis Oculares y Contactología Especializada, Argentina

Title: JUMAT orbit implant
Biography:

Sergio Ozan is an Optician at the University of Buenos Aires, Argentina. He is a Specialist in Contact Lenses, specialist and manufacturer of ocular prosthesis. He is a scientific adviser for ocular prosthesis in APO (Asociación Profesional de Optómetras in Argentina). He is a Precursor and creator of multiperforated orbital implant, JUMAT. He is a Precursor and creator of expander orbit asmotic hydrogel filling for microophthalmia. He is the Director of CEPROC and the Director of Ocular Prosthesis Division in Perfect Vision, Santiago, Chile. He is the Developer of one-hour customized ocular prosthesis method, unique in Latin-America and the Precursor and creator of the first prosthetic sclera lens

Abstract:

This implant was created considering the good qualities of previous ones and improving their flaws. To start the fabrication, I looked for material that was easy to get in the market and with low cost. JUMAT is made with hypoallergenic high-density polymethylmethacrylate. It is made in different sizes, from 10 mm to 22 mm. This is really helpful for the surgeon, as he counts with different sizes at the operation theater and can select on site the most suitable one. This is essential for the successful adaptation of the implant. JUMAT orbit implant has multiple perforations of different diameters, being the principal one, the one that marks the implant axis and crosses it completely. This perforation has larger diameter in the back area and smaller in the front one. All other perforations connect with the principal one and interconnect among themselves too. This system of perforations is essential to foster an excellent vascularization. Within ten days of surgery the patient is ready to start with the testing for the adaptation of a prosthethic eye. As from 2010 to present time, 235 JUMAT implants have been implanted with only two expulsions reported. These cases were studied in detail. It was observed that both cases involved children with retinoblastoma. They were enucleated and were implanted with JUMAT. These two children were derived to Children's Garrahan Hospital in Buenos Aires, leading children’s hospital in Argentina. They were under radiotherapy and chemotherapy. These two processes avoided tissue vascularization by necrosia, which determined the expulsion of the implant.

 

 

 

Considering material, cost of material, availability of various implant dimensions, surgeon possibility of choosing exact measure during operation, JUMAT implant proves to be the best option.

 

Statistics

 

The study covers a ten year period, 2000 – 2010, with 316 surgeries.

 

Study field

Age

Cause Eye Loss

implants/ surgeries

Children

1-5

Retinoblastoma

192

Pubers/Teens

8-14

Infections/Accidents

60

Young adult

18-26

Accidents/Tumors/Infections

34

Adult

30-60

Accidents/Glaucoma

30

 

None JUMAT implant expelled. 100% effectiveness

 

Comparison of expulsion

 

Research between 2000 - 2010.

 

Cases

Implant

% expulsion

60

Hydroxyapatite

15

75

Medpor

38

90

PMMA

78

316

JUMAT

0

 

Martin De Tomas

Laboratorio Óptico De Tomás, USA

Title: Blue light, yesterday and today
Biography:

Martin de Tomas is currently associated as a researcher at Laboratorio Óptico De Tomás, USA.

Abstract:

My contribution to the event is from my specialty and it is about the new technologies in ophthalmic lenses that exceed 400 nm of visible spectrum protection but without altering the perception of colors. I was able to read the following when I entered the site eye 2017: We strive to provide a perfect stage to share knowledge and experiences and to encourage people to carry out effective research and work to combat the global threat, BLIND. That we all understand and explain how important it is to protect childhood from the visual system of spectral radiation through ophthalmic lenses is one of the first steps to combat this threat. We will provide a brief introduction of how the human being was exposed in its principles to the spectral fringe of the blue light and how does it changed drastically in the last ten years. We will also discuss about light visible high energy and phototoxic effect on the retina as it impacts in the short and long term, the blue violet light, in the different structures of the eye and in the quality of the vision; evolution of ophthalmic filters: What types of filters have we used in ophthalmology for many years to filter the blue? How to reintroduce the old concepts in the prevention of led light? And we will also compare the main filtering technologies as lenses with 400 nm visual spectrum are not enough anymore and about light blue cut before and after on the ophthalmic lenses.

Biography:

Ophthalmologist at Fundacion Universitaria San Martin, Colombia

Abstract:

Objective: The objective of the study is to demonstrate the effectiveness of 3D technology in the ocular rehabilitation of patients with total or partial loss of the eyeball.

 

Material & Methods: A prospective, unicentric clinical trial was conducted with patients with total and partial loss of the eyeball. In total, eight wells were studied, over a period of 15 months. These patients were initially evaluated with the protocol pre-established by Proofel and adapted with ocular prostheses made based on the topographic interpretation of the cavity (visualization technique and wax modeling of previous models), taking of quantitative and quantitative measurements, and evaluation of the three adaptation criteria: Mobility, symmetry and aesthetics and parameterization of the final devices. Once the patients were adapted, controls were performed, where the three adaptation criteria were evaluated again and once the stability of the adaptation was confirmed, the data collection stage was started for the three-dimensional reconstruction of the cavities under study, with the use of a high-tech scanner capable of capturing complex geometries, sharp edges, thin slits and with a resolution of up to 0.1mm, the necessary images were captured and then exported through files to a 3D design software where the computer aided design, which was subsequently printed by computer-aided manufacturing, making this impression the future prosthesis model for each patient. We then performed an analysis of the parameters of the devices in use and those obtained by 3D printing; we also applied a survey that allowed us to compare the two techniques from the patients' appreciation.

 

Results: Patient-friendly, objective, reliable, comfortable, zero contact technology with minimal exposure time to collect precise information about the cavity, for use in all types of patients with total or partial loss of the eyeball.

 

Conclusions: 3D technology is the current technology that gives the possibility of disintegrating the manufacturing and the adaptation process because it is effective and effective, for the three-dimensional obtaining of the cavity form of patients with total or partial loss of the globe ocular, allows to design a device personalized computer aided and to measure real, that satisfies the exigencies of that cavity, being reflected in a natural adaptation that fulfills the three criteria of adaptation.

Biography:

Johanna Garzón P is a candidate of Doctor with PhD in Advanced Optometry and Vision Sciences in Advanced at Valencia University, Spain. She is an Optometrist of The Salle University, Specialist in Ocular Primary Careat Andina University FUAA-Colombia, Master’s in Pharmacology Sciences at National University of Colombia, UNAL. She has her expertise and research job in ocular surface, dry eye and ocular pharmacology. She is titular Professor at the Salle University in Bogotá Colombia, and is the President of Fedopto, the Professional College of Optometry in Colombia.

Abstract:

Purpose: To assess the tear film lipid layer pattern in type 2 diabetes patients  and healthy subjects,  the correlation of the symptoms between the Ocular Surface Disease Index (OSDI) symptom questionnaire and the National Eye Institute Vision Functioning Questionnaire (NEI-VFQ).

 

Methods: This is a case-control study and all patients were investigated for the presence of meibomian gland dysfunction/MGD using the International Work Shop in MGD’s criteria according to the meibomian glands/MG secretion’s quality and viscosity, MG’s morphology, and lipid layer thickness/LLT. The LLT was measured using interferometry Polaris system prior and subsequent to a 10-minute period. The Ocular Surface Disease Index (OSDI) symptom questionnaire and the National Eye Institute Vision Functioning Questionnaire (NEI-VFQ) were correlated. The results between groups were analyzed using the statistical Kruskal-Wallis and Mann-Whitney tests association between variables was explored by Spearman’s correlation.

 

Results: 73 subjects were studied (37 diabetics and 36 controls). The mean age was 59±8.7% of participants presented MGD (76% diabetics and 67% controls).The symptoms through OSDI questionnaire was significantly higher (p=0.016) in the diabetic group with a lower NEI VFQ (67.86; p=0.002).  The lipid layer pattern was lower in diabetic patients group with DGM; NIBUT was lower in the diabetic group (sg 2.47±1.2), with a significant inverse correlation (52.22%) with MG inflammation and a moderate correlation (32.4%) with corneal staining. The LLT presented a positive correlation between the meibomian gland alteration as hyperkeratinisation and inflammation (p=0.0005) and symptoms. Positive correlations were found in diabetic group between corneal staining and symptoms with OSDI questionnaire.

 

Conclusions: A correlation was found between NIBUT, inflammation and obstruction of the MG in symptomatic type 2 diabetes patients. The LLT is lower in diabetic group than in normal subjects, which implies decreased tear film stability and increased subjective symptoms associated with a decreased quality of life.

Biography:

Syed Mohammed Didarul Alam is presently associated as a professor at the University Of Chittagong, Bangladesh as a senior optometrist.

 

Abstract:

The purpose of this study was to find out the ocular status, health seeking behaviors and barriers to uptake eye care services among children of slum community in Chittagong, Bangladesh. The study was conducted in several urban slums in Chittagong city, which is home of slum children. A total of 410 children were clinically examined. Their accompanying guardians were also interviewed for collecting health seeking behaviors and identifying the barriers, if any, to uptake eye care services. Three focus group discussions were held with guardians. Nearly 47.3% of the sampled children were male and 52.7% female. About 40% of children had different ocular complaints, where we found 36.6% having some ocular abnormalities. Most of them (73%) had never seen an eye care specialist. About 89.6% of the respondents have normal visual acuity 6/6. The common ocular problems encountered were Refractive Error (26.7%), Allergic Conjunctivitis (21.3%), Blepharitis (16.0%), Squint (7.3%), Convergence Insufficiency (4.0%), Mebomian Gland Dysfunction (8.7%), Dacrocystitis (3.3%), Congenital Cataract (2.7%), Conjunctivitis (4.0%), Xerophthalmia (1.3%), microphthalmos (1.3%), Ocular FB (1.3%). Infrequently Entropin, Corneal Opacities, Retobulbar Neuritis, Retinal Detachment, Episceleritis, Scelritis, Chalazion, and Stye were also present among children. About 4.9% children have night vision problem. About 16.8% of the children complained to have some abnormalities. It may be mentioned that, any complaint does not mean that the children have abnormalities, because they have not been assessed clinically. Many slum dwellers strongly believe about traditional treatment, but most of the guardians (70%) know where to go for the treatment. However, the guardians' of slum children cannot afford medical treatment due to their low financial condition.

Biography:

Raghda Faisal is a student of optometry at Alneelain University, Sudan.

Abstract:

Aim: The aim of the study is to investigate the changes in macular thickness of myopic eyes using spectral domain optical coherence tomography (OCT).

 

Methods: A prospective cross-sectional study was performed in 100 young Sudanese patients (15-30 years) with myopia in period from June to December 2015 at Makkah Eye complex, Khartoum, Sudan. Patients were divided into three groups according to their refractive error and axial length: low and medium myopia (LMM), high myopia (HM) and super high myopia (SHM). A ccomprehensive ophthalmic examination was performed; including measurement of visual acuity, refraction, and axial length. Subjects with ophthalmic abnormalities were excluded. Thus, Carl Ziess OCT was used to evaluate total macular thickness, foveal thickness, parafoveal and perifoveal thickness and macular volume. The differences among experimental groups were analyzed by one-factor analysis of variance. However, associations between macular thickness and refractive error/axial length were analyzed by Pearson’s correlation analysis.

 

Results: The study revealed that there was no significant difference in age among the three groups (p=0.278). The mean of refractive error in the LMM, HM, and SHM was -3.11±1.20 D, -7.49±1.03 D and -16.58±5.00 D, respectively (p<0.001). The foveal thickness of the three groups was 236.38±20.80 µm, 245.43±29.55 µm and 258.93±32.38 µm, respectively, and there was statistically significance between the groups. In addition, the total macular thickness, parafoveal and perifoveal thickness, and macular volume decreased with increased myopia and axial length. Whereas, foveal thickness has negative correlations with refractive error and axial length (p<0.001).

 

Conclusion: When myopia and axial length increase the foveal thickness increase. In contrast parafoveal, perifoveal and total macular thickness decreased. Also the macular volume decreased.

Biography:

Pinaz Nasim has currently completed her Optometrist degree at Amity Medical School, Amity University, Haryana, India and is currently associated with Amity University.

 

Abstract:

Aim: The aim of the study is to compare the reading speed of myopes with the emmetropes.
 
Methodology: Students were selected using a qualitative non-random sampling strategy. A brief history was taken on the basis of the inclusion and exclusion criteria. Those, meeting the eligibility criteria of the research were contacted through door to door survey and were invited to the clinic. The aided vision was taken in the clinics using Log MAR chart for myopes. We included only simple myopes in the study. The emmetropes were also checked for their vision. Extra-ocular and anterior segment evaluation was performed with the help of Slit lamp examination. The reading speed was taken using N notation SUSSEX vision card and a stop watch. The candidate was told to read aloud and as fast as he/she can without hampering the accuracy of the words. Their reading voice was recorded in the voice recorder and then was analysed for errors. The number of words read correctly was divided by the time taken to read the whole text. The value was then calculated in words per minute.
 
Results: The mean reading speed of myopes’ is 146. 9506 w/min with the standard deviation of 34.71026 and the mean reading speed in the emmetrope is 147.3201 with the standard deviation of 28.88421.
 
Conclusion: The initial reading speed of the myopes is not more than that of the emmetropes. Emmetropes have better reading speed. However, the difference is not significant.