Treatment of Refractive Errors 屈光不正的处理和治疗 Shihao Chen MD.0D.Ms School of Ophthalmology Optometry 验光学课程 视光学教研室2007
Treatment of Refractive Errors 屈光不正的处理和治疗 Shihao Chen M.D., O.D., M.S. School of Ophthalmology & Optometry
HUMAN EYE:OPTICAL CONDITIONS 人眼屈光状态 Emmetropia Ametropia Refractive Axial Presbyopia Combined Myopia Hyperopia Astigmatism Parallel incident light is Parallel incident lightis Focal planes and the focused in front of the retina focused behind the retina circle of least confusion 验光学课程 视光学教研室T200
HUMAN EYE: OPTICAL CONDITIONS 人眼屈光状态 Emmetropia Ametropia Refractive Axial Combined Myopia Presbyopia Hyperopia Astigmatism Parallel incident light is focused in front of the retina Parallel incident light is focused behind the retina Focal planes and the circle of least confusion 1- D25
AMETROPIA屈光不正 Z P V U E ● Emmetropia正视状态： DNERU HDFZN parallel incident rays come to a focus on FENHZ NRDFU the retina ·Ametropia屈光不正： 2PYU日 一 parallel incident rays do not come to a D N E R U focus on the retina 40:4 验光学课程 视光学教讲室200
AMETROPIA 屈光不正 • Emmetropia 正视状态: – parallel incident rays come to a focus on the retina • Ametropia 屈光不正: – parallel incident rays do not come to a focus on the retina 1- P26
AMETROPIA:CLASSIFICATION ·Refractive ametropia屈光性 incorrect power of the cornea/crystalline lens ·Axial ametropia轴性 incorrect axial length of the eyeball Combined ametropia混合性： a combination of both refractive and axial ametropias 验光学课程 视光学教研室200
• Refractive ametropia 屈光性: – incorrect power of the cornea/crystalline lens • Axial ametropia 轴性: – incorrect axial length of the eyeball • Combined ametropia 混合性: – a combination of both refractive and axial ametropias AMETROPIA: CLASSIFICATION
THE TYPES OF AMETROPIA Myopia近视： without astigmatism with astigmatism Hyperopia(or hypermetropia)远视： without astigmatism -with astigmatism ·Astigmatism散光 验光学课程 视光学教研室2007
THE TYPES OF AMETROPIA • Myopia 近视: – without astigmatism – with astigmatism • Hyperopia (or hypermetropia) 远视: – without astigmatism – with astigmatism • Astigmatism 散光
MYOPIA近视 Refractive Myopia Axial Myopia (Optics of the eye too strong) (Eye too long) 验光学课程 视光学教讲室200
MYOPIA 近视 Refractive Myopia (Optics of the eye too strong) Axial Myopia (Eye too long) 1-D30 1-D31
MYOPIA-SIGNS SYMPTOMS 近视眼症状和体征 RHDVU Signs: PN2共D 州P￥F9 -reduced distance visual acuity normal near visual acuity Symptoms: constant distance blur squinting -short working distance often a great dis used 验光学课程 视光学教研室200
MYOPIA - SIGNS & SYMPTOMS 近视眼症状和体征 • Signs: – reduced distance visual acuity – normal near visual acuity • Symptoms: – constant distance blur – squinting – short working distance often used 1-P34
MIYOPIA:PREVALENCE发病率 ● Factors affecting myopia prevalence: -Age Race(Chinese and Japanese highest)Y>W>B Sex:F>M Years of education Amount of near work Family income (diet/lifestyle?) 验光学课程 视光学教研室2007
MYOPIA: PREVALENCE 发病率 • Factors affecting myopia prevalence: – Age – Race (Chinese and Japanese highest) Y>W>B – Sex: F>M ？ – Years of education – Amount of near work – Family income (diet/lifestyle?)
Solutions for myopia近视眼解决方法 1.Spectacles 2.Contact lens:soft and hard 3.Refractive surgery:RK,PRK,LASIK. Lasek,Epi-Lasik,PSSO,CLE+IOL, Back 验光学课程 视光学教研室200
Solutions for myopia 近视眼解决方法 1. Spectacles 2. Contact lens: soft and hard 3. Refractive surgery: RK, PRK, LASIK, Lasek, Epi-Lasik, PSSO, CLE+IOL, 4. …. Back
Principle of myopia correction ·MPVA近视轿忑ua款原则 Under 12 yo ---cycloplegic refraction Think about Age,profession,VA,sign of asthenopia, balance of EOM... 验光学课程 视光学教研室207
Principle of myopia correction • MPMVA for general population 近视矫正一般原则 • Under 12 yo --- cycloplegic refraction • Think about Age, profession, VA, sign of asthenopia, balance of EOM…