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