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disclosure
no financial interest
Intrastromal Corneal Ring Segment Implantation for Advanced
Keratoconus
Paulo Torres, Rita Reis, Isabel Sampaio, Mª Antonia Costa,
Nuno Alves, Miguel Gomes, Luis Oliveira
Cornea and External Disease Unit - Hospital St. António - Porto - PORTUGAL
disclosure: no financial interest
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PURPOSE
evaluate the refractive and visual results of Intacs SK (6 mm diameter)
for patients with advanced keratoconus (k > 55D)
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MATERIAL/METHODS
• 20 eyes (20 patients)• severe keratoconus (> 55D)
• UCVA, BSCVA, SE, Ks
• topical anesthesia• incision: 80% deep, steepest axis
• 8 months minimum follow-up
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K-readings
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pre-op pos-op
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57,5 52,9
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Spherical Equivalent
pre-op pos-op0
2
4
6
8
10
12
14
16
Category 1 Category 2 Category 3
10,35
4,66
16
Series 1
Series 2
Series 3
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-4,66
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-10,35
pre-op pos-op
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-16
-14
-12
-10
-8
-6
-4
-2
0
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UCVA
pre-op pos-op
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20/400
20/80Novidades no
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20/20
20/200
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BSCVA
pre-op pos-op
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20/45
20/200
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20/20
20/200
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BSCVA (pre-op/pos-op)
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Série 1
Série 2
Série 3
Série 4
Série 5
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20/20
20/25
20/40
20/200
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CASE EXAMPLE 1
pre-op
BSCVA: 20/80 +0,50-3,00(60)
Ks: 50,9/58,0
pos-op
UCVA: 20/25
Ks: 46,3/53,4
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CASE EXAMPLE 2
pre-op
BSCVA: 20/400 -3,50-4,00(20)
Ks: 49,7/58,7
pos-op
UCVA: 20/40 BSCVA: 20/25 -0,25-3,00(30)
Ks: 46,0/51,6
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BSCVA (pre-op/pos-op)
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20/20
20/25
20/40
20/200
K>55D
Intacs SK(n = 20)
K<55D
7 mm Intacs(n = 223)
K>55D
7 mm Intacs(n = 18)
advanced keratoconus (K>55D)
7 mm Intacs vs Intacs SK
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CONCLUSIONS
• safe and effective• delay/avoid keratoplasty• no lost BSCVA• better then 7 mm Intacs for advanced keratoconus
• long term stability ?
• max. Ks (60-62D)