all-in–one f emtosecond laser r efractive surger y lk beginning with barraquer in 1950
DESCRIPTION
IN THE NAME OF GOD All-in-one Femtosecond Laser Refractive Surgery Sh.Hanjani , M.D Ophthalmologist. All-in–one F emtosecond Laser R efractive Surger y LK beginning with barraquer in 1950 Microkeratomes : 1980 – 1990 for ALK and LK PRK :1988 used & 1995 approved. - PowerPoint PPT PresentationTRANSCRIPT
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IN THE NAME OF GOD
All-in-one Femtosecond Laser Refractive Surgery
Sh.Hanjani , M.DOphthalmologist
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All-in–one Femtosecond Laser Refractive Surgery
- LK beginning with barraquer in 1950
- Microkeratomes : 1980 – 1990 for ALK
and LK
- PRK :1988 used & 1995 approved
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Lasik :Early 1990 ( Burratto & Pallikaris ) Advantages : - Short period of discomfort - Minimal wound –
healing reaction - Rapid visual recovery Microkeratom complication : - Button hole flap - Incomplete flap - Irregular flap - Flap displacement Femtosecond laser : ( photo disruption →
Gas bubble ) - More accurate flap - ↓ button hole & irregular
flap
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Femtosecond Laser : in other corneal
surgeries - PK
- LK
- EK
- Tunnels of intrastromal rings
- Remove refractive lenticule within
the cornea
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All-in-one Femtosecond Laser Refractive Surgery
1- Femtosecond lenticule extraction (FLE×)2- Small-incision lenticule extraction ( SMILE )
Surgical technique
- All-in-one FLRS - Myopia ( -10.00 ) - Myopic astigmatism (5) - Hyperopia (+6)
underway study.- Patient selection : same criteria as LASIK- Anterior surface of lenticule 80 µ below surface
like LASIK and lenticule diameter 5 – 7 mm and minimum lenticule edge 10 – 15 µ
- Side cut incision :FLE× : 280 – 330° SMILE : 30 – 50 °(sup or
sup.temp)
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FIGURE 1. A photograph of the VisuMax laser with thepatient’s bed.
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FIGURE 2. Curved contact glass interface of the VisuMax laser.
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FIGURE 7. A, Initial separation of the posterior surface of the lenticule from the corneal bed in the FLEx procedure. Note that theflap has already been lifted. B, Peeling off the lenticule from the corneal bed in the FLEx procedure. C, The appearance of thecornea after the lenticule has been removed in the FLEx procedure. D, The appearance of the cornea at the end of the FLEx
procedure once the flap has been refloated back in place.
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Complications
- Intraoperatively 1- Suction loss
Squeezing Fluid
ingress Gas
bubble
2- Wrong plane selected FLE×
SMILE
- Post operatively : - Fine scaring of flap & lenticule edge - Dry eye - Fine interface haze - Under and over correction
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Results
- 500 eyes until november 2009
- Results are comparable with excimer
laser
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