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Low myope wants full correction for outdoor activities

The 57-year-old patient underwent LASIK with the Bausch & Lomb Zyoptix.

Issue: April 1, 2004

ByGordon Balazsi, MD, FRCSC

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History: A 57-year-old man presented for LASIK consultation. He was a low myope with excellent functional vision indoors, but he desired a full correction because he is an active hunter with bow and arrow. When counseled regarding treatment options, he chose a custom wavefront correction. I report the results of the right eye at 3 months after surgery, as the results of both eyes are very similar.

Preoperative examination:

Uncorrected visual acuity: 20/80; high contrast logMAR: 0.85
Manifest refraction: —1.00 –1.00 × 65
Visual acuity: 20/20; high contrast logMAR: 0.04; low contrast logMAR: 0.32
Procedure: LASIK with Bausch & Lomb Zyoptix wavefront treatment

Postoperative refraction:

Uncorrected visual acuity: 20/20; high contrast logMAR: 0.12
Refraction: Plano –0.50 × 10
Visual acuity: 20/20+; high contrast logMAR: 0.04; low contrast logMAR: 0.24
Higher-order aberrations (6-mm pupil): Reduced from 0.61 µm to 0.36 µm
Vertical coma: Essentially unchanged (from 0.05 µm to 0.08 µm)
Horizontal coma: Reduced from 0.18 µm to 0.03 µm
Spherical aberration: Reduced from –0.45 µm to –0.14 µm
Discussion: This case demonstrates the usefulness of custom treatment even in cases of low myopia with relatively low preoperative higher-order aberrations. The Snellen acuity data indicate an appropriate result expected even from a standard laser treatment. However, the improvements of low-contrast acuity and higher-order aberrations are usually not seen after standard treatment, especially in the case of spherical aberration. The patient said he was very happy with his postoperative visual quality when hunting.

For Your Information:

• Gordon Balazsi, MD, FRCSC, can be reached at Clinique Laservue, 1100 Beaumont Ave., Suite 201, Mount-Royal, Quebec, Canada H3P 3H5; 514-738-6666; fax: 514-738-1769; e-mail: laservue@laservue.net; Web site: www.laservue.net. Dr. Balazsi is a paid consultant for Bausch & Lomb.