Clinicopathologic Reports, Case Reports and Small Case Series
October 2001

Ultrasound Biomicroscopy of an Implantable Miniaturized Telescope

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Copyright 2001 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.2001

Arch Ophthalmol. 2001;119(10):1544-1546. doi:

Age-related macular degeneration (ARMD) is a leading cause of visual loss in adults older than 60 years.1 Once central vision has been seriously jeopardized, visual function can only be improved with optical devices that produce magnification of near and distant images. Koziol et al2 reported the use of a teledioptric lens implant with a high-minus central zone (2.5 mm). When this implant is used in combination with eyeglasses as part of a teledioptric system, the magnified visual field obtained is 2.6 times greater than that achieved using an external telescope (magnification power, ×3; focusing distance, 50 cm; magnification power with the aid of external spectacles, ×8; visual field, 6, 6° equivalent to 20° in the retina). However, the disadvantages found when a combined telescopic system is used still occur. The implantable miniaturized telescope (IMT) (VisionCare Ophthalmic Technologies Ltd, Yehud, Israel) designed by Lipshitz et al3 should partially prevent the discomfort involved when an external or partially external telescope is used. The IMT is mounted on an intraocular lens implant and consists of a glass Galilean telescope (4.4 mm long and 3.2 mm in diameter) installed in a hole centered in a plate-design polymethyl methacrylate intraocular lens (7.0 × 4.75 mm) (Figure 1). The total diameter of the device is 13.5 mm. Implantation of the IMT is performed by widening up to 8 mm the incision after lens phacoemulsification with scleral incision and capsulorrhexis, which theoretically ensures the intracapsular implantation and thus stability and adequate position of the IMT.

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