Yazan Gammoh

Dr. Yazan Gammoh

orcid

Research Focus & Metrics

Academic Career Length

22Years (2005-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
9 June 2005 in Ophthalmic and Physiological Optics
Verified
Journal Article
Closed access
PDF file
EMEdward Mallen
Edward Mallen
YGYazan Gammoh
Yazan Gammoh
MBMuawyah Dawoud Al Bdour
Muawyah Dawoud Al Bdour
FSFouad N. Sayegh
Fouad N. Sayegh

26 February 2021 in Cureus
Verified
Journal Article
Open access
PDF file
YGYazan Gammoh
Yazan Gammoh
Background: Several ocular and visual symptoms resulting from use of digital devices are collectively known as digital eye strain (DES) or computer vision syndrome (CVS). Few studies exist on the prevalence of DES among young adults in the Eastern Mediterranean region. Objectives: This study aimed to investigate the prevalence and severity of digital eye strain among a university student population in Jordan. Methods: A cross-sectional study was conducted with students enrolled at Al-Ahliyya Amman University in Jordan. DES was evaluated using the Computer Vision Syndrome Questionnaire (CVS-Q), which was filled out by students who were approached at random and signed an informed consent to participate in the study. Information related to the type, intensity of usage, settings of digital device (DD) used, and post-device use student-reported physical complaints were recorded. Results: Data from 382 students were analyzed. Prevalence of CVS was 94.5%, with tearing being the most prevalent symptom (59%), while double vision was least reported by students (18.3%). DD use for more than six hours per day was reported by 55.5% of the sample size, and 30.7% of the students reported pain in joints of fingers and wrists after using a mobile phone. Conclusion: CVS is highly prevalent among university students in Jordan. With the increased dependence on online education due to coronavirus disease, safe habits in digital device use are recommended.

1 October 2017 in Diabetes, Metabolic Syndrome and Obesity
Verified
Journal Article
Open access
PDF file
MBMay M Bakkar
May M Bakkar
MHMera F Haddad
Mera F Haddad
YGYazan Gammoh
Yazan Gammoh
Background: Increasing the level of awareness of diabetic retinopathy among individuals with type 2 diabetes mellitus is considered an important factor for early diagnosis and management of diabetic retinopathy. The aim of this study was to evaluate awareness of diabetic retinopathy among a sample of type 2 diabetes mellitus patients in Jordan. Patients and methods: The study period was from August to December 2015. The sample was selected randomly from patients with type 2 diabetes mellitus from the general population in three main cities of Jordan (Amman, Irbid, and Zarqa). A questionnaire was distributed to 237 participants with diabetes to assess their awareness and knowledge of diabetes and diabetic retinopathy. The questionnaire included questions to assess awareness about diabetic retinopathy, sources of knowledge about the disease, and patients’ knowledge and compliance with available treatments and routine eye examinations. Patients were also questioned about the barriers that may interfere with early eye examination. Results: A total of 237 participants (107 [45.1%] females and 130 [54.9%] males) with type 2 diabetes were interviewed. Mean age±SD for the study population was 54.51±10.28 years. Of the study population, 88.2% were aware that diabetes can affect the eyes and 81% reported that diabetic retinopathy can lead to blindness. Higher level of patients’ awareness of diabetic retinopathy was related to higher level of formal education (p<0.05). The main source of information about diabetic retinopathy as reported by 47.3% patients was general practitioners. Patients’ compliance with diabetes management was relatively high; however, their compliance with routine retinal assessment was poor, with only a total of 29.5% of participants having had an eye examination in the previous year. Conclusion: Awareness of the nature and consequences of diabetic retinopathy among patients with diabetes in Jordan is relatively high. However, patients’ motivation to undergo retinal assessment was poor in the sample, thus hindering early diagnosis and management.

1 August 2024 in Clinical Optometry
Verified
Journal Article
Open access
PDF file
YGYazan Gammoh
Yazan Gammoh
PMPriya Morjaria
Priya Morjaria
SBSandra S Block
Sandra S Block
JMJessica Massie
Jessica Massie
PHPeter Hendicott
Peter Hendicott
Purpose: To provide information on the demographics of optometrists and regulation of the optometry profession in countries who were members of the World Council of Optometry (WCO) during the period 2022– 2023. Methods: A non-random, purposive sampling and a key informant strategy was employed to conduct a survey-based cross-sectional study on the professional landscape and distribution of optometrists; educational landscape; legislative aspects of the profession; and the scope of optometry practice in countries who were members of WCO during the period 2022– 2023. Key informants were identified by WCO country members’ leadership. Results: In the 39 countries surveyed, one optometrist serves 23,200 persons on average. Only 46.2% of the countries met the internationally suggested 1:10,000 optometrist-to-population ratio. The average male-to-female ratio was 45% males/55% females, with a division of average age as follows: under 45 years of age 46% as compared to above 45 years of age 54%. It was reported that optometry is not regulated in France, Portugal, India, Kenya and Cameron. Thirteen countries (33%) do not require a Bachelor’s degree as a minimum to practice optometry. Use of diagnostic drugs is prohibited in 20% of the countries, with 25% of the countries limiting the use of therapeutic pharmaceutical agents. Conclusion: Many countries where optometry is recognized struggle to have an adequate number of optometrists; this hinders access to eye care. This is compounded by unregulated minimum levels of education for entry-level optometric practitioners. In addition, several countries limit or prohibit many optometric procedures that restrict the ability of optometrists to provide eye care and vision health services at the primary care level.

1 October 2016 in Contact Lens and Anterior Eye
Verified
Journal Article
Closed access
MHMera F. Haddad
Mera F. Haddad
MBMay Bakkar
May Bakkar
YGYazan Gammoh
Yazan Gammoh
PMPhilip Morgan
Philip Morgan

19 May 2021 in PLOS ONE
Verified
Journal Article
Open access
PDF file
YGYazan Gammoh
Yazan Gammoh
MAMustafa Abdu
Mustafa Abdu
The study aimed to assess contact lens (CL) wear and care habits among adults in Sudan. An observational, non-interventional, multi-center, cross-sectional study was conducted in the CL departments of all the eye hospitals and centers, and optical centers in the Khartoum State, Sudan. Established CL wearers residing in Khartoum State, Sudan. CL wear profile, CL usage habits, hand and CL hygiene habits were assessed using an interviewer-administered questionnaire. The average age of the 442 participants was 24.57 (± 4.87) years. Women comprised 92% of the sample. Smoking was reported by 15.8% of the sample. 81.9% wore soft spherical CL, with 43.4% of the participants were prescribed CL on a yearly replacement schedule. Only 68.3% were prescribed CL by an eye care practitioner. Multipurpose solutions were used by 78.8% of the sample to clean CL, and by 52% to clean the lens case. Compliance rate for CL wear and care among participants was 81.1%. None of the participants reported sharing CL or CL case and rinsing the case with tap water. High compliance level was observed for overnight wear; swimming and showering with CL; handwashing before CL insertion; and cleaning of CL. Moderate compliance rates were recorded for cleaning and replacing lens case, and topping up or sharing solution. Low compliance was noted for attending after care visits. CL wearers in Sudan exhibit high to moderate levels of compliance to most contact lens wear and care aspects, except for attending aftercare visits. CL practitioners in Sudan are encouraged to prescribe CL appropriate to the lifestyle and economic situation of patients and actively recommend care products. In addition, practitioners need to follow up with patients to attend aftercare appointments, where hygienic wear and care habits should be emphasized.