Gilashin ruwan tabarau.
A farkon kwanakin gyaran hangen nesa, duk ruwan tabarau na gilashin ido an yi su ne da gilashi.
Babban abu don ruwan tabarau na gilashi shine gilashin gani.Fihirisar refractive ya fi na ruwan tabarau na guduro girma, don haka ruwan tabarau na gilashi ya fi siriri fiye da ruwan tabarau na guduro a cikin iko iri ɗaya.Ma'anar ma'auni na ruwan tabarau na gilashi shine 1.523, 1.60, 1.70, 1.80, 1.90.Gilashin ruwan tabarau suna da kyawawan abubuwan watsawa da kayan aikin injiniya: ƙididdiga mai jujjuyawa akai-akai da kaddarorin jiki da sinadarai.
Kodayake ruwan tabarau na gilashi suna ba da na'urorin gani na musamman, suna da nauyi kuma suna iya karyewa cikin sauƙi, mai yuwuwar haifar da mummunar cutarwa ga ido ko ma asarar ido.Don waɗannan dalilai, ba a daina amfani da ruwan tabarau na gilashi don gilashin ido.

Filastik ruwan tabarau.
● 1.50 CR-39
A cikin 1947, Kamfanin Lens na Armorlite a California ya gabatar da ruwan tabarau na gilashin ido mara nauyi na farko.An yi ruwan tabarau na roba polymer mai suna CR-39, taƙaitaccen bayanin "Columbia Resin 39," saboda shi ne tsari na 39 na wata robobin da aka warke daga zafin rana wanda masana'antun PPG suka haɓaka a farkon shekarun 1940.
Saboda nauyinsa mai sauƙi (kimanin rabin nauyin gilashin), ƙananan farashi da kyawawan halaye masu kyau, CR-39 filastik ya kasance sanannen abu don ruwan tabarau na ido har ma a yau.
● 1.56 NK-55
Mafi araha na manyan ruwan tabarau mafi girma kuma mai tauri sosai idan aka kwatanta da CR39.Kamar yadda wannan abu ya kasance a kusa da 15% na bakin ciki da 20% mai sauƙi fiye da 1.5 yana ba da zaɓi na tattalin arziki ga waɗancan marasa lafiya waɗanda ke buƙatar ruwan tabarau na bakin ciki.NK-55 yana da ƙimar Abbe na 42 yana mai da shi kyakkyawan zaɓi don takaddun magani tsakanin -2.50 da +2.50 dioptres.
● Manyan ruwan tabarau na filastik
A cikin shekaru 20 da suka gabata, don mayar da martani ga buƙatun sirara, gilashin ido masu sauƙi, da yawa masu kera ruwan tabarau sun gabatar da manyan ruwan tabarau na filastik.Waɗannan ruwan tabarau sun fi sirara kuma sun fi sauƙi fiye da ruwan tabarau na filastik CR-39 saboda suna da fihirisa mafi girma na juzu'i kuma suna iya samun ƙarancin ƙayyadaddun nauyi.
MR ™ Series babban ruwan tabarau na gani ne wanda Japan Mitsui Chemicals ta tsara tare da babban juzu'i, ƙimar Abbe mai girma, ƙarancin ƙayyadaddun nauyi da juriya mai ƙarfi.
MR™ Series ya dace musamman don ruwan tabarau na ido kuma an san shi da farkon thiourethane tushe babban kayan ruwan tabarau.Jerin MR™ yana ba da samfura iri-iri don samar da mafi kyawun mafita ga masu amfani da ruwan tabarau.
RI 1.60: MR-8
Mafi kyawun daidaiton babban kayan ruwan tabarau tare da mafi girman kaso na kasuwar kayan ruwan tabarau na RI 1.60.MR-8 ya dace da kowane ƙarfin ruwan tabarau na ido kuma sabon ma'auni ne a cikin kayan ruwan tabarau na ido.
RI 1.67: MR-7
Matsayin duniya RI 1.67 kayan ruwan tabarau.Babban kayan don ruwan tabarau na bakin ciki tare da juriya mai ƙarfi.MR-7 yana da mafi kyawun iyawar launi mai launi.
RI 1.74: MR-174
Kayan ruwan tabarau na babban maɗaukaki don ruwan tabarau na bakin ciki.Masu sanye da ruwan tabarau masu ƙarfi yanzu sun sami 'yanci daga ruwan tabarau masu kauri da nauyi.

Polycarbonate ruwan tabarau.
An ƙera polycarbonate a cikin 1970s don aikace-aikacen sararin samaniya, kuma a halin yanzu ana amfani da shi don kallon kwalkwali na 'yan sama jannati da kuma iskar jirage na jirgin sama.An gabatar da ruwan tabarau na gilashin ido da aka yi da polycarbonate a farkon shekarun 1980 don mayar da martani ga buƙatun ruwan tabarau marasa nauyi, masu jurewa.
Tun daga wannan lokacin, ruwan tabarau na polycarbonate sun zama ma'auni don gilashin aminci, tabarau na wasanni da kayan ido na yara.Saboda ba su da yuwuwar karyewa fiye da ruwan tabarau na filastik na yau da kullun, ruwan tabarau na polycarbonate shima zaɓi ne mai kyau don ƙirar kayan sawa mara kyau inda aka haɗa ruwan tabarau zuwa abubuwan firam ɗin tare da hawan haƙora.
Yawancin sauran ruwan tabarau na filastik ana yin su ne daga tsarin gyare-gyaren simintin gyaran kafa, inda ake toya kayan filastik ruwa na dogon lokaci a cikin nau'ikan ruwan tabarau, yana ƙarfafa robobin ruwa don ƙirƙirar ruwan tabarau.Amma polycarbonate wani thermoplastic ne wanda ke farawa a matsayin abu mai ƙarfi a cikin nau'i na ƙananan pellets.A cikin tsarin kera ruwan tabarau da ake kira allura gyare-gyare, ana dumama pellet ɗin har sai sun narke.Ana shigar da polycarbonate mai ruwa da sauri cikin gyaggyaran ruwan tabarau, a matse shi a ƙarƙashin babban matsi kuma a sanyaya shi don samar da samfurin ruwan tabarau da aka gama a cikin minti kaɗan.

Trivex ruwan tabarau.
Duk da fa'idodinsa da yawa, polycarbonate ba shine kawai kayan ruwan tabarau da ya dace da aikace-aikacen aminci da kayan ido na yara ba.
A cikin 2001, Masana'antu na PPG (Pittsburgh, Penn.) sun gabatar da kayan ruwan tabarau masu kishiya mai suna Trivex.Kamar ruwan tabarau na polycarbonate, ruwan tabarau da aka yi da Trivex suna da bakin ciki, masu nauyi kuma sun fi juriya fiye da ruwan tabarau na filastik ko gilashin yau da kullun.
Ruwan tabarau na Trivex, duk da haka, sun ƙunshi monomer na tushen urethane kuma an yi su daga tsarin gyare-gyaren simintin gyaran kafa kamar yadda ake yin ruwan tabarau na filastik na yau da kullun.Wannan yana ba da ruwan tabarau na Trivex fa'idar crisper optics fiye da ruwan tabarau na polycarbonate mai allura, bisa ga PPG.