Hasil Pencarian  ::  Simpan CSV :: Kembali

"Penelitian ini bertujuan mengevaluasi efektifitas dan prediktabilitas prosedur Laser in situ Keratomileusis (LASIK) pada miopia ringan dan miopia sedang, yang dikerjakan oleh tiga pembedah. Bersifat retrospektif, data diambil dari rekam medis 68 penderita (129 mata) yang menjalani prosedur LASIK. Prosedur LASIK dilakukan oleh 3 pembedah (X, Y dan Z) dengan menggunakan instrumen dan prosedur pembedahan yang sama. Pasien dikelompokkan menjadi 2 kelompok, yaitu kelompok A (kurang dari S-6.00 dioptri) dan kelompok B (S-6.00 – S-10.00 dioptri). Evaluasi tindak lanjut dilakukan pada hari ke-1, ke-7, bulan ke-1 dan ke-3. Hasil : Efektifitas dan prediktabilitas dinilai berdasarkan tajam penglihatan tanpa koreksi dan status refraksi (dalam ekuivalen sferis) yang dicapai. Sebaran korelasi antara koreksi yang diharapkan dan yang diperoleh dihitung dengan menggunakan koefisien determinasi (R2). Uji statistik menunjukkan hasil yang relatif sama untuk ketiga pembedah. Ternyata efektifitas dan prediktabilitas prosedur LASIK yang dilakukan oleh tiga pembedah menunjukkan hasil yang relatif sama. Faktor pembedah tampaknya tidak mempengaruhi hasil prosedur LASIK. (Med J Indones 2003; 12: 148-54)

---

The purpose of this study was to evaluate the effectiveness and predictability of Laser in situ Keratomileusis (LASIK) procedure performed by three surgeons in low and moderate myopia. One hundred twenty nine eyes from 68 patients underwent LASIK procedure, performed by three different surgeons (X, Y, Z) using the same procedure and same instruments were reviewed. These patients are divided into two groups, group A ( below – 6.00 diopters ) and group B ( between – 6.00 and –10.00 diopters ). Patients were observed on day 1, day 7, 1st month and 3rd month. Results: The evaluation of effectiveness and predictability is based upon uncorrected visual acuity (UCVA) and spherical equivalent refraction, respectively. The variation dispersion between attempted correction and achieved correction is measured using coefficient of determination (R2). The statistical analysis shows indifferent results for the three surgeons. The conclusion was that the effectiveness and predictability of LASIK procedure performed by the three surgeons in both groups are indifferent. Hence, this study suggests that the surgeon factor does not affect the result of LASIK procedure. (Med J Indones 2003; 12: 148-54)"

"Tulisan ini bertujuan memperkenalkan kepada masyarakat Indonesia, terutama para dokier, suatu metode hum yang disebut wavefront guided laser in-situ keratomileusis (wavefront guided LASIK, custom IASIK) yang merupukan prosedur terkini dalam mengatasi kelainan refraksi mata. Prosedur ini dittsulkan digunakan sejak 19%. Prosedur ini dapat memperbaiki kelainan refraksi mata, bahkan membuai ketajaman penglihatan menjadi supernormal. Prosedur ini berkembang melalui beberapa penerapan penemuan yang mula-mula tidak ada kaiiannya dengan operasi mata, nwlainkan semata-mata oleh tuntutan perkembangan dalam ilmu astronomi dan optik."

"ABSTRACT

Probing of the atmospheric parameters have been done by many scientists since a century ago up to present with various techniques. A simple system of laser radar without using any collimated beam but a reflected mirror as transmitter and a small cassegranian type (10.5 an in diameter) telescope as receiving was constructed to investigate the relative Mie backscattering coefficient by utilizing a nitrogen laser as a light source in the range of measurement bellow 1 Km. The backscattered light received by the receiving telescope is converted into electric current by photomultiplier and is shown and known as "A scope" display on an oscilloscope. SNR of the signal from photomultiplier was increased by using a boxcar integrator and its output could be recorded with XY recorder."

"ABSTRACTLaser induced thin film production (LITFP) technique was employed for making plumbum (Pb) thin film by nitrogen laser deposition in miniature scale. The energy of nitrogen laser operated at 12.5 kv, 90 torr was 3.5 mj with 5 ns pulse duration, thus producing peak power at around 0.7 MW. Pb plasma of 1 cm diameter was generated in each laser bombardment, producing thin film above the glass substrate. The thin film characteristics were measured by means of their thickness and surface morphology using scanning electron microscope (SEM). It was proved that there was a linear relationship between the number of laser shots and film thickness."

"Kopling antara amplifier permukaan miring dan fiber taper lens-ended diselidiki secara teori. Penelitian teori didasarkan pada model gelombang bidang tiga dimensi yang dihitung melalui pergeseran fasa akibat permukaan iring. Kopling diselidiki berkenaan dengan parameter-parameter berkas dari pandu gelombang amplifier lens-ended, dan juga berkenaan dengan posisi fiber. Terjadinya rugi-rugi kopling karena permukaan miring dan karena variasi dari uji lens yang terbaik, rugi untuk permukaan miring 10° ditemukan lebih kecil dari 0.5 dB dibandingkan amplifier permukaan normal.

---

The coupling between angled-facet amplifiers and tapered lens-ended fibers is investigated theoretically. The theoretical investigation is based on a three-dimensional plane wave model which accounts for the phase differences introduced by the angled facets. The coupling is investigated with respect to the beam parameters of the amplifier wave guids and the tapered lens-ended fiber, and also with respect to the fiber position. For optimized lens radii the excess loss for 0l0° facet angle is found to be less than 0.5 dB compared to a normal facet amplifier."

"ABSTRACTThe frequency dobled Rd: YAG laser (532 nm/10ns, 15mj/pulse) uses a pulsed, frequency dobled; which provides a monochromatic, energy source with extremely high peak power and to has capability to develop of latent fingerprint on various surface. In the porous surfaces, this laser to has superiority, the compared with the development another methods, like powder and chemical method in latent fingerprint development. The high peak power of the laser causes Palmar sweat: contain a variety compounds, among them amino acids, oils, enzymes, vitamins and other chemicals with in the print to fluoresce. Some latent fingerprints will fluoresce in their natural state during exposure to this laser energy. The natural state fluorescing prints make can be documented and recording by high-resolution TV cameras and monitor for maximum sensitivity. The next step, the compare latent fingerprints products with visible impression by comparable instruments, see patterns of the friction ridges and be found same amount of their galton detail. "

"The purpose of this reserach is to find out the influence of laser shooting to the ovaries stem of eye,ablation of crab's eye to the level of egg's maruty,the diameter of eggs and the number of eggs scylla serrata....."