复旦大学：《眼科学》课程教学课件（英文，Ophthalmology）Lens and Cataract 晶状体与白内障

Lens and cataract 罗怡( Luo yi.MDPh.D) Eye EnT Hospital 复旦大学附厲眼耳鼻喉科凄院

Lens and Cataract 罗 怡 （Luo Yi. M.D Ph. D) Eye & ENT Hospital 1

Lens anatom Sclera Choroid Ciliary Body and Muscle Vitreous Body. Fovea Centralis Ins in Macula Lens Optic Nerve Cornea Zonular lanelle 巴复旦大学附属眼耳鼻喉科蔗院

Lens Anatomy 2

Lens function 1. Refraction 2. Accommodation 复旦大学附厲眼耳鼻喉科箧院

Lens Function 1.Refraction 2.Accommodation 3

Lens Function----Refraction Cornea >refractive power: 43D(70%) >refractive index: 0=1.377 Lens >refractive power: 20D >refractive index n=1. 437 (nucleus>cortex) 复旦大学附属眼耳鼻喉科虔院

Lens Function----Refraction • Cornea: refractive power: 43D (70%) refractive index: n=1.377 • Lens: refractive power: 20D refractive index: n=1.437 (nucleus>cortex) 4

Lens function-- Accommodation ★ objects Ciliary Zonular fiber Shape of lens muscle distance relax tension flatten near contract relaxation spherical PresbyopIc Symptom loss of it 复旦大学附厲眼耳鼻喉科医院

Lens Function---- Accommodation objects Ciliary muscle Zonular fiber Shape of lens distance relax tension flatten near contract relaxation spherical Presbyopic Symptom loss of it 5

Lens disease Cataract Lens opacity cataract · Location change ectopia lentis dislocated lens 复旦大学附厲眼耳鼻喉科医院

Lens Disease • Lens opacity : cataract • Location change : ectopia lentis dislocated lens 6

Cataract > Cataract major cause of blindness China's 2001 census in the population of over 60 yrs was about 42. 8%prevalence ate 50%for 65-74 yrs 70%for over 75 yrs >Vision Action 2020 (the right to sight eliminate the main causes of avoidable blindness by the year 2020 复旦大学附属眼耳鼻喉科函院

Cataract Cataract major cause of blindness China's 2001 census in the population of over 60 yrs was about 42.8% prevalence rate 50% for 65-74 yrs 70% for over 75 yrs Vision Action 2020 (the right to sight): eliminate the main causes of avoidable blindness by the year 2020 7

Classfication of cataract According to etiology 1. congenital cataract 2. age-related cataract(ARC/senile cataract) 3. complicated cataract 4 traumatic cataract 5. drug-induced cataract 6. after cataract cataract associated with systemic disease EENT 复旦大学附厲眼耳鼻喉科院

Classfication of cataract According to etiology : 1. congenital cataract 2. age-related cataract (ARC/senile cataract) 3. complicated cataract 4. traumatic cataract 5. drug-induced cataract 6. after cataract 7. cataract associated with systemic disease 8

ARC

ARC 9

ARC

10 ARC