eMedicine Specialties > Ophthalmology > Presbyopia

Presbyopia: Cause and Treatment: Multimedia

Author: Ronald A Schachar, MD, PhD, Adjunct Professor, Department of Physics, University of Texas, Arlington; Chief Executive Officer, Velatec; Consultant, Presby Corporation
Contributor Information and Disclosures

Updated: Jul 14, 2006

Multimedia

Atopic keratoconjunctivitis.Media file 1: Atopic keratoconjunctivitis.
Atopic keratoconjunctivitis.

Atopic keratoconjunctivitis.

Reflection in the center of the balloon.Media file 2: Reflection in the center of the balloon.
Reflection in the center of the balloon.

Reflection in the center of the balloon.

Reflection in the periphery of the balloon.Media file 3: Reflection in the periphery of the balloon.
Reflection in the periphery of the balloon.

Reflection in the periphery of the balloon.

In the unaccommodated state, all the zonules are ...Media file 4: In the unaccommodated state, all the zonules are under tension (a). According to the Schachar theory, in the accommodated state, the equatorial zonules are under increased tension, and the anterior and posterior zonules are relaxed (b).
In the unaccommodated state, all the zonules are ...

In the unaccommodated state, all the zonules are under tension (a). According to the Schachar theory, in the accommodated state, the equatorial zonules are under increased tension, and the anterior and posterior zonules are relaxed (b).

Schema of the configuration of the eye in the una...Media file 5: Schema of the configuration of the eye in the unaccommodated state.
Schema of the configuration of the eye in the una...

Schema of the configuration of the eye in the unaccommodated state.

Schema of the configuration of the ciliary body i...Media file 6: Schema of the configuration of the ciliary body in the accommodated state according to the Schachar theory.
Schema of the configuration of the ciliary body i...

Schema of the configuration of the ciliary body in the accommodated state according to the Schachar theory.

Polymethyl methacrylate band.Media file 7: Polymethyl methacrylate band.
Polymethyl methacrylate band.

Polymethyl methacrylate band.

Incisions for placement of the polymethyl methacr...Media file 8: Incisions for placement of the polymethyl methacrylate band.
Incisions for placement of the polymethyl methacr...

Incisions for placement of the polymethyl methacrylate band.

Placement of the polymethyl methacrylate band.Media file 9: Placement of the polymethyl methacrylate band.
Placement of the polymethyl methacrylate band.

Placement of the polymethyl methacrylate band.

Scheiner experiment.Media file 10: Scheiner experiment.
Scheiner experiment.

Scheiner experiment.

More on Presbyopia: Cause and Treatment

References

References

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Further Reading

Keywords

vision loss, visual deficit

Contributor Information and Disclosures

Author

Ronald A Schachar, MD, PhD, Adjunct Professor, Department of Physics, University of Texas, Arlington; Chief Executive Officer, Velatec; Consultant, Presby Corporation
Ronald A Schachar, MD, PhD is a member of the following medical societies: American Academy of Ophthalmology, American Association for the Advancement of Science, American Medical Association, American Psychological Society, American Society of Cataract and Refractive Surgery, American Society of Contemporary Ophthalmology, Association for Research in Vision and Ophthalmology, New York Academy of Sciences, Phi Beta Kappa, Sigma Xi, and Texas Medical Association
Disclosure: Nothing to disclose.

Medical Editor

Stephen D Plager, MD, FACS, Chief, Department of Ophthalmology, Dominican Hospital; Assistant Clinical Professor, Department of Ophthalmology, Stanford University Hospital
Stephen D Plager, MD, FACS is a member of the following medical societies: American College of Surgeons, American Medical Association, American Society of Cataract and Refractive Surgery, and California Medical Association
Disclosure: Nothing to disclose.

Pharmacy Editor

Simon K Law, MD, PharmD, Assistant Professor of Ophthalmology, Jules Stein Eye Institute; Chief of Section of Ophthalmology Surgical Services, Department of Veterans Affairs Healthcare Center, West Los Angeles
Simon K Law, MD, PharmD is a member of the following medical societies: American Academy of Ophthalmology, American Glaucoma Society, and Association for Research in Vision and Ophthalmology
Disclosure: Nothing to disclose.

Managing Editor

J James Rowsey, MD, Former Director of Corneal Services, St Luke's Cataract and Laser Institute, Florida
J James Rowsey, MD is a member of the following medical societies: American Academy of Ophthalmology, American Association for the Advancement of Science, American Medical Association, Association for Research in Vision and Ophthalmology, Florida Medical Association, Pan-American Association of Ophthalmology, Sigma Xi, and Southern Medical Association
Disclosure: Nothing to disclose.

CME Editor

Lance L Brown, OD, MD, Ophthalmologist, Affiliated With Freeman Hospital and St John's Hospital, Regional Eye Center, Joplin, Missouri
Disclosure: Nothing to disclose.

Chief Editor

Hampton Roy Sr, MD, Associate Clinical Professor, Department of Ophthalmology, University of Arkansas for Medical Sciences
Hampton Roy Sr, MD is a member of the following medical societies: American Academy of Ophthalmology, American College of Surgeons, and Pan-American Association of Ophthalmology
Disclosure: Nothing to disclose.

 
 
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