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NR. 2/2009
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Wpływ zmian
geometrii rogówki oka u pacjentów z krótkowzrocznością po
zabiegu LASIK na tonometryczny pomiar ciśnienia
wewnątrzgałkowego
Effect of Geometrical Changes in Cornea on Tonometrical
Intraocular Pressure Measurement in Patients with Myopia after
LASIK
Elżbieta Szul-Pietrzak1, Andrzej
Hachoł1, Ewa Pelczar2
1 Instytut Inżynierii Biomedycznej i Pomiarowej
Politechniki Wrocławskiej
Dyrektor: prof. n. tech. dr hab. n. fiz. inż. lek. med. Halina
Podbielska
2 NZOZ Eye Laser Center we Wrocławiu
Kierownik: lek. med. Ewa Pelczar |
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| Summary: |
Purpose: To assess
the influence of the geometrical changes in corneal
curvature on the intraocular pressure (IOP) measurement
in patients with myopia after laser in situ
keratomileusis (LASIK).
Patients and Methods: 363 patients were
investigated before and after LASIK procedures. In 725
eyes, IOP was measured using Goldmann applanation
tonometer (GAT) and noncontact air tonometer (AP) which
is commonly used in clinical practice. Intraocular
pressure was measured in 725 eyes before and 6 weeks
after LASIK. Corneal curvature was measured with the
Humphrey Corneal Topography keratometer (from Zeiss),
and central corneal thickness (CCT) with pachymeter
SP-3000 (from Tomey). The database of patients was
analyzed using Statistica 6.0 software.
Results: Statistical analysis showed
statistically significant influence of the geometrical
changes in corneal curvature after LASIK on IOP measured
using GAT and AP. There were positive correlations
between changes in intraocular pressure measurements (∆IOPGAT
& ∆IOPAP) and changes in central corneal thickness (∆CCT)
and radius of corneal curvature (∆R).
Conclusion: We showed that measured IOP value
after the LASIK significantly differs from measured IOP
value before LASIK. This difference depends not only on
CCT changes but also on R changes. |
| Key words: |
intraocular pressure,
LASIK, applanation methods, cornea. |
| Słowa kluczowe: |
ciśnienie wewnątrzgałkowe,
LASIK, metody aplanacyjne, rogówka. |
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