同济大学：《眼科学》课程电子教案（PPT课件讲稿）视光学基础 Basic Optics

Disclaimer Please prepare for certification testing with materials from the organization in which you want your certification granted i.e.: ·AOA JCAHPO ·ABO ·NCLE ■OT

 Please prepare for certification testing with materials from the organization in which you want your certification granted i.e.:  AOA  JCAHPO  ABO  NCLE  OT

Outline The Visual System Physiology Ametropias Ophthalmic Lenses Properties of Light UV,Visible,and Infrared Spectrums Reflection,Refraction,Absorption ·Aberrations Lens Designs ·Fitting Basic Optical Formulas

 The Visual System ▪ Physiology ▪ Ametropias  Ophthalmic Lenses ▪ Properties of Light ▪ UV, Visible, and Infrared Spectrums ▪ Reflection, Refraction, & Absorption ▪ Aberrations ▪ Lens Designs ▪ Fitting  Basic Optical Formulas

The Visual System There are two main refractive bodies in the human eye... Cornea Crystalline Lens

There are two main refractive bodies in the human eye... Cornea Crystalline Lens

The Visual System Cornea The cornea is the primary refractive element in the eye... ..with a power of around +42-44 diopters

The cornea is the primary refractive element in the eye... Cornea ... with a power of around +42-44 diopters

The Visual System Cornea The tear film maintains both the health and optics of the cornea

The tear film maintains both the health and optics of the cornea... Cornea

The Visual System Crystalline Lens The crystalline lens has a power of around +12-18 diopters... ...it is primarily responsible for changing the eye's focal point...a term referred to as accommodation

The crystalline lens has a power of around +12-18 diopters... Crystalline Lens ...it is primarily responsible for changing the eye’s focal point…a term referred to as accommodation

The Visual System The retina is the "film"or sensory body... Retina

The retina is the “film” or sensory body... Retina

The Visual System Retina Light is converted to electrical impulses which are sent Fovea through the optic nerve... ...the "blind spot"is the point at which the optic nerve connects Optic Macula Disc

Light is converted to electrical impulses which are sent through the optic nerve... Retina ...the “blind spot” is the point at which the optic nerve connects Fovea Macula Optic Disc

The Visual System Eye Movement or ocular motility The eye is connected to the orbit by several muscles which control movement... Orbit

The eye is connected to the orbit by several muscles which control movement... Eye Movement or ocular motility Orbit

Visual Anomalies Ametropias In a"normal"eye,parallel light is brought to a focus on the retina... ...an eye free of refractive error is called "emmetropic

Ametropias In a “normal” eye, parallel light is brought to a focus on the retina... ...an eye free of refractive error is called “emmetropic