[Chemist]

Попалась статья, а точнее комментарий к статье:

Schallhorn SC, Tanzer DJ, Kaupp SE, et al. Comparison of night driving performance after wavefront-guided and conventional LASIK for moderate myopia. Ophthalmology 2009; 116:702–9.

Сам комментарий:

Night driving after LASIK. Brown S. Ophthalmology. 2009 Apr;116(4):702-9.

Пара интересных мест.

I must object to the authors' conclusions vis-à-vis the importance of low-light pupil diameter (PD). Schallhorn et al state, "The fact that the low-light pupil size is not related to NDS performance should not be a surprise. Most studies have not shown an association between pupil size and quality of vision complaints after LASIK." The authors reference 2 studies from 2000, which is hardly "most” studies. Devices that measure the low-light PD multiply yearly, suggesting a strong market, suggesting that "most" refractive surgeons are concerned about PD and wish to measure it accurately for surgical planning.

Т.е. все таки размер зрачка и ночное зрение после Ласик не связаны?
И вот момент:

My criticism does not invalidate the article’s central and useful conclusion, that w-LASIK improves simulated night driving performance while c-LASIK worsens it. As regards the effect of pupil size, readers might be guided by basic corneal optics4 until similar functional studies with credible data on the dark-adapted PD are published. It is likely that PD will become less predictive of vision quality, not because it is optically irrelevant, but rather because modern aspheric ablation profiles have finally caught up with it.

Что такое с-LASIK? Получается что асферика дает лучше результат, чем стандартный Лазик? Но опять же, w-Lasik и асферика это из одной оперы или нет?

[Laserdoc]

w-Lasik - вэйвфронт ЛАЗИК (кастом), c-LASIK - обычный ЛАЗИК. Асферика и кастом - разные вещи. Но при асферике и тем более при кастом расширяется реальная эффективная оптическая зона что может иметь влияние на качество ночного зрения.

[Spiderman]

вот еще есть исследование на тему

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1954826/

[Spiderman]

добавлю еще ссылок в эту тему

"In conventional LASIK treatment using the Alcon LADARVision 4000 platform, a larger surgical optical zone diameter significantly decreases higher order aberrations after LASIK."

The OZ zone to pupil ratio (fractional clearance) had a significant impact on HOA induction after wavefront-guided LASIK.

http://www.ncbi.nlm.nih.gov/pubmed/14604712

http://www.ncbi.nlm.nih.gov/pubmed/12504738

http://www.ncbi.nlm.nih.gov/pubmed/16706101

Lasik Halo and Starburst; Large Pupil Size Importance


Subjective night vision complaints after LASIK for moderate to high myopia. Dependence on pupil size and wavefront aberrations

[Chemist]

Одни исследования противоречат другим:
http://www.medscape.com/viewarticle/...src=mp&spon=36

Preoperative Pupil Size Does Not Affect Quality of Vision After LASIK
Although large pupil size is viewed by some ophthalmologists as a relative contraindication to undergoing LASIK, preoperative pupil size does not affect quality of vision after wavefront-guided LASIK
A number of previous studies found a strong correlation between the level of attempted correction and visual symptoms, particularly glare, after refractive surgery," the authors explain. "It is possible that the use of wavefront-guided ablations may play a role in reducing visual symptoms after refractive surgery, especially in eyes with higher levels of myopia and astigmatism

Я так понимаю, что это одна из нерешенных проблем лазерной коррекции и видимо надо чуть-чуть обождать, пока проблема будет до конца изучена.
Да и wavefront-guided LASIK это custom lasik и он дает реже проблемы с ночным зрением, я правильно понимаю?