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A. A. Onua

Publications (7)

Prevalence of Myocilin Gene Mutation in Adult-Onset Primary Open Angle Glaucoma and Non-glaucoma Subjects Who are Indigenes of Rivers State, Nigeria

A. A. Onua & C. N. Pedro-Egbe · Asian Journal of Research and Reports in Ophthalmology · 2023

Background: Glaucoma is the leading cause of irreversible blindness incapacitating over 80 million people worldwide. Several pathogenetic mechanisms have been postulated to explain the optic nerve damage that occur in POAG among which genetic predisposition is prominent. Gene-Lin...

Open access Research Article

Ocular and Systemic Abnormalities Associated with Paediatric Cataract at Evangelical Church of West Africa Eye Hospital, Kano

A. A. Onua, B. Fiebai & S. O. Abu · International Journal of TROPICAL DISEASE & Health · 2018

Background: Cataract is a leading cause of childhood visual impairment in developing countries.  Cataract in children causes the blurring of retinal images and therefore disrupts the development of the immature visual pathways in the central nervous system with subsequent develop...

Open access Research Article 10.9734/IJTDH/2018/43570

Bilateral Optic Atrophy Following Methanol Poisoning: A Case Report

A. A. Onua, I. C. Nwadiuto & C. N. Pedro-Egbe · Journal of Advances in Medicine and Medical Research · 2016

Background: Methanol is an industrial chemical found in many products including antifreeze solutions, solvents and fuels. Most cases of methanol poisoning among humans occur following accidental ingestion, inhalation or dermal exposure. Humans may sometimes ingest methanol as an...

Open access Research Article 10.9734/BJMMR/2016/26645

Non-contact Tonometry Versus Pachymetry Corrected Intraocular Pressure: Any Difference? A Case for Pachymetry during Glaucoma Screening

E. Awoyesuku & A. A. Onua · Current Journal of Applied Science and Technology · 2019

Objective: This study sets out to determine if there is any statistical difference in the results of measuring intraocular pressure (IOP) uncorrected for Central Corneal Thickness with Air Puff Tonometry and corrected with pachymetry for clients undergoing screening for glaucoma...

Open access Research Article 10.9734/cjast/2019/v38i630393

Presentation of Retinoblastoma Patients in a Missionary Eye Hospital in Nigeria

S. O. Abu, A. A. Onua & S. A. H. Cookey · Asian Journal of Research and Reports in Ophthalmology · 2018

Background: The clinical presentation of retinoblastoma is essential in the diagnosis, treatment and prognosis for the survival of patients. Moreover, early detection and treatment of the disease can reverse the disease process and influence the modality of management with the ev...

Open access Research Article

Evaluation of Presbyopia in a Peripheral Eye Clinic in Port Harcourt, Nigeria

C. S. Ejimadu, A. A. Onua & E. Ani · Journal of Advances in Medicine and Medical Research · 2017

Background: Uncorrected presbyopia is a significant and increasing cause of visual disability globally. Presbyopia is the decline of the focusing ability of the crystalline lens due to loss of elasticity which makes it less effective in accommodation. Presbyopia is primarily age-...

Open access Research Article 10.9734/JAMMR/2017/33717

Knowledge, Attitude and Practice of Eyelid Surgeries among Surgeons in Nigeria

C. S. Ejimadu, B. Fiebai & A. A. Onua · International Journal of TROPICAL DISEASE & Health · 2019

Aim: To determine the level of knowledge, attitude and practice of eyelid surgeries among surgeons in Nigeria. Methods: A self-administered questionnaires about their knowledge, attitude and practice of eyelid surgeries were given to 135 medical practitioners attending the 49th A...

Open access Research Article 10.9734/ijtdh/2019/v35i130108