1 / 14

Presbyopia

Presbyopia. Walter Huang, OD Yuanpei University Department of Optometry. Definition. Latin definition Presbyopia = “old man’s eye” . Definition. Decrease in the amplitude of accommodation or loss of accommodative ability with age. Etiology. Natural part of the aging process

cian
Download Presentation

Presbyopia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Presbyopia Walter Huang, OD Yuanpei University Department of Optometry

  2. Definition • Latin definition • Presbyopia = “old man’s eye”

  3. Definition • Decrease in the amplitude of accommodation or loss of accommodative ability with age

  4. Etiology • Natural part of the aging process • Onset at approximately 40 years of age and over though may be earlier in low hyperopes

  5. Progression • Once presbyopia occurs, it increases over a period of 10 to 12 years, after which it stabilizes

  6. Symptoms • Blurry vision at near • Difficult or impossible to accommodate sufficiently for near work

  7. Increasing Near Point of Accommodation with Age

  8. Amplitude of Accommodation and Age (Donder’s Table)

  9. Near Work • Comfortable vision at near uses less than or equal to half of the available amplitude of accommodation • Near work becomes difficult when the amplitude of accommodation is less than 5.00D

  10. Example • Working distance at 40 cm requires 2.50D of accommodation • Patient A has 5.00D of accommodation • He can use up to 2.50D of accommodation comfortably • Therefore, he has just enough accommodative power for reading at 40 cm, and no reading glasses are required • Patient B has 3.00D of accommodation • He can use up to 1.50D of accommodation comfortably • Therefore, he needs an additional 1.00D of accommodative power for reading at 40 cm, and +1.00D reading glasses are required

  11. Management • Converging or plus lenses for near work only in spectacles or contact lenses • Changes in prescriptions are required every two to three years for presbyopia • Surgery

  12. Management • Spectacles • Single vision reading glasses • Multifocal lenses containing near Add • Bifocal lenses • Trifocal lenses • Progressive addition lenses

  13. Management • Contact lenses • Single vision contact lenses with glasses • Monovision contact lenses • Bifocal and multifocal contact lenses • Modified monovision contact lenses

  14. Management • Surgery • Laser in-situ keratomileusis (LASIK) • More for presbyopic hyperopia than presbyopia myopia at the moment • Multifocal intraocular lens (IOL) • Conductive keratoplasty (monovision) • Scleral expansion

More Related