title: Modeling of vision loss due to vitreous hemorrhage by Monte Carlo simulation.
abstract: Vitreous hemorrhage is the leaking of blood into the vitreous humor which results from different diseases. Vitreous hemorrhage leads to vision problems ranging from mild to severe cases in which blindness occurs. Since erythrocytes are the major scatterers in blood, we are modeling light propagation in vitreous humor with erythrocytes randomly distributed in it. We consider the total medium (vitreous humor plus erythrocytes) as a turbid medium and apply Monte Carlo simulation. Then, we calculate the parameters characterizing vision loss due to vitreous hemorrhage. This work shows that the increase of the volume fraction of erythrocytes results in a decrease of the total transmittance of the vitreous body and an increase in the radius of maximum transmittance, the width of the circular strip of bright area, and the radius of the shadow area.
authors.affiliation: Helwan University, Faculty of Engineering, Biomedical Engineering Department, 1 Sherif Street, Helwan, 11792, Cairo, Egypt.
authors.forename: Tarek A
authors.initials: TA
authors.lastname: Al-Saeed
authors.affiliation: Ain-Shams University, Faculty of Science, Physics Department, Abbassia, 11566, Cairo, Egypt.
authors.forename: Sayed Y
authors.initials: SY
authors.lastname: El-Zaiat
mesh_terms: D048429:Cell Size; D003198:Computer Simulation; D004906:Erythrocyte Count; D004912:Erythrocytes; D006801:Humans; D008027:Light; D008954:Models, Biological; D015233:Models, Statistical; D009010:Monte Carlo Method; D009391:Nephelometry and Turbidimetry / Q000379:methods; D012542:Scattering, Radiation; D014786:Vision Disorders / Q000209:etiology / Q000473:pathology / Q000503:physiopathology*; D014785:Vision, Ocular; D014822:Vitreous Body / Q000473:pathology / Q000503:physiopathology*; D014823:Vitreous Hemorrhage / Q000150:complications / Q000473:pathology / Q000503:physiopathology*