Visual Acuity Accommodation Accommodation is a dynamic dynamic

  • Slides: 33
Download presentation

Visual Acuity 看得清楚與視角

Visual Acuity 看得清楚與視角

Accommodation 眼睛對焦的調節能力 Accommodation is a dynamic, dynamic optical change in the dioptric power of

Accommodation 眼睛對焦的調節能力 Accommodation is a dynamic, dynamic optical change in the dioptric power of the eye allowing the point of focus of the eye to be changed from distant to near objects

Accommodation

Accommodation

Accommodation Power看近調節費力 A diopter(D) is a reciprocal meter and is a measure of the

Accommodation Power看近調節費力 A diopter(D) is a reciprocal meter and is a measure of the vergence of light. Distance Accommodation power 1 m 1 D 50 cm 2 D 10 cm 10 D

Monitor & Eye 看螢幕操勞眼睛 Monitor Distance Desk Top 75 cm 1. 33 D Notebook

Monitor & Eye 看螢幕操勞眼睛 Monitor Distance Desk Top 75 cm 1. 33 D Notebook 50 cm 2 D i. Pad 33 cm 3 D Smartphone 20 cm 5 D Monitor 光源 亮度&光譜 1. CCFL: Cold Cathode Fluorescent Lamp 2. LED: Light Emitted Diode

Accommodation Apparatus 調節的機構

Accommodation Apparatus 調節的機構

Accommodative Power vs. Age 調節能力降低 老花眼

Accommodative Power vs. Age 調節能力降低 老花眼

Light & Eye 藍紫外線傷眼睛 Phototoxicity 1. UV light 太陽、螢光燈管洩漏 2. Blue light (400 -500

Light & Eye 藍紫外線傷眼睛 Phototoxicity 1. UV light 太陽、螢光燈管洩漏 2. Blue light (400 -500 nm) 調色光 UV spectrum UV-A (400 -320 nm) UV-B (320 -290 nm) UV-C (290 -100 nm)

3 C & Myopia Progression 近看操勞則近視

3 C & Myopia Progression 近看操勞則近視

3 C and IOP Elevation 看近眼壓升

3 C and IOP Elevation 看近眼壓升

3 C & Retinal damage Blue Light Damage UV Leakage 高能色光傷眼

3 C & Retinal damage Blue Light Damage UV Leakage 高能色光傷眼

Innervation of the eye

Innervation of the eye